diff --git a/bukkit/src/main/java/me/lucko/luckperms/bukkit/migration/MigrationPermissionsEx.java b/bukkit/src/main/java/me/lucko/luckperms/bukkit/migration/MigrationPermissionsEx.java
index 76312e8b..96342dd3 100644
--- a/bukkit/src/main/java/me/lucko/luckperms/bukkit/migration/MigrationPermissionsEx.java
+++ b/bukkit/src/main/java/me/lucko/luckperms/bukkit/migration/MigrationPermissionsEx.java
@@ -91,7 +91,6 @@ public class MigrationPermissionsEx extends SubCommand<Object> {
         super(CommandSpec.MIGRATION_COMMAND.localize(locale), "permissionsex", CommandPermission.MIGRATION, Predicates.alwaysFalse());
     }
 
-    @SuppressWarnings("deprecation")
     @Override
     public CommandResult execute(LuckPermsPlugin plugin, Sender sender, Object o, List<String> args, String label) {
         ProgressLogger log = new ProgressLogger(Message.MIGRATION_LOG, Message.MIGRATION_LOG_PROGRESS, "PermissionsEx");
@@ -187,7 +186,6 @@ public class MigrationPermissionsEx extends SubCommand<Object> {
 
     private static Map<String, List<String>> getPermanentPermissions(PermissionEntity entity) {
         try {
-            //noinspection unchecked
             PermissionsData data = (PermissionsData) GET_DATA_METHOD.invoke(entity);
             return data.getPermissionsMap();
         } catch (IllegalAccessException | InvocationTargetException e) {
diff --git a/common/src/main/java/me/lucko/luckperms/common/cacheddata/type/MetaAccumulator.java b/common/src/main/java/me/lucko/luckperms/common/cacheddata/type/MetaAccumulator.java
index 027bc2b5..2a7e182a 100644
--- a/common/src/main/java/me/lucko/luckperms/common/cacheddata/type/MetaAccumulator.java
+++ b/common/src/main/java/me/lucko/luckperms/common/cacheddata/type/MetaAccumulator.java
@@ -65,6 +65,8 @@ public class MetaAccumulator {
     private enum State {
         /** Marks that the accumulator is still gaining (accumulating) new data. */
         ACCUMULATING,
+        /** Marks that this accumulator is being completed. */
+        COMPLETING,
         /** Marks that the process of gaining (accumulating) new data is complete. */
         COMPLETE
     }
@@ -102,7 +104,7 @@ public class MetaAccumulator {
      * data is read.
      */
     public void complete() {
-        if (!this.state.compareAndSet(State.ACCUMULATING, State.COMPLETE)) {
+        if (!this.state.compareAndSet(State.ACCUMULATING, State.COMPLETING)) {
             return;
         }
 
@@ -110,6 +112,8 @@ public class MetaAccumulator {
         if (!this.meta.containsKey(NodeTypes.WEIGHT_KEY) && this.weight != 0) {
             this.meta.put(NodeTypes.WEIGHT_KEY, String.valueOf(this.weight));
         }
+
+        this.state.set(State.COMPLETE);
     }
 
     // accumulate methods
diff --git a/common/src/main/java/me/lucko/luckperms/common/commands/generic/permission/PermissionCheckInherits.java b/common/src/main/java/me/lucko/luckperms/common/commands/generic/permission/PermissionCheckInherits.java
index ffedefad..69036df8 100644
--- a/common/src/main/java/me/lucko/luckperms/common/commands/generic/permission/PermissionCheckInherits.java
+++ b/common/src/main/java/me/lucko/luckperms/common/commands/generic/permission/PermissionCheckInherits.java
@@ -71,7 +71,7 @@ public class PermissionCheckInherits extends SharedSubCommand {
         }
 
         String s = MessageUtils.formatTristate(result.getResult());
-        Message.CHECK_INHERITS_PERMISSION.send(sender, holder.getFormattedDisplayName(), node, s, MessageUtils.contextSetToString(plugin.getLocaleManager(), context), String.valueOf(location));
+        Message.CHECK_INHERITS_PERMISSION.send(sender, holder.getFormattedDisplayName(), node, s, MessageUtils.contextSetToString(plugin.getLocaleManager(), context), location);
         return CommandResult.SUCCESS;
     }
 
diff --git a/common/src/main/java/me/lucko/luckperms/common/commands/misc/TreeCommand.java b/common/src/main/java/me/lucko/luckperms/common/commands/misc/TreeCommand.java
index d490f70d..12ee6f6d 100644
--- a/common/src/main/java/me/lucko/luckperms/common/commands/misc/TreeCommand.java
+++ b/common/src/main/java/me/lucko/luckperms/common/commands/misc/TreeCommand.java
@@ -97,7 +97,7 @@ public class TreeCommand extends SingleCommand {
         Message.TREE_URL.send(sender);
 
         Component message = TextComponent.builder(url).color(TextColor.AQUA)
-                .clickEvent(new ClickEvent(ClickEvent.Action.OPEN_URL, String.valueOf(url)))
+                .clickEvent(new ClickEvent(ClickEvent.Action.OPEN_URL, url))
                 .hoverEvent(new HoverEvent(HoverEvent.Action.SHOW_TEXT, TextComponent.of("Click to open the tree view.").color(TextColor.GRAY)))
                 .build();
 
diff --git a/common/src/main/java/me/lucko/luckperms/common/commands/misc/VerboseCommand.java b/common/src/main/java/me/lucko/luckperms/common/commands/misc/VerboseCommand.java
index 2043d8b4..01d8c454 100644
--- a/common/src/main/java/me/lucko/luckperms/common/commands/misc/VerboseCommand.java
+++ b/common/src/main/java/me/lucko/luckperms/common/commands/misc/VerboseCommand.java
@@ -118,7 +118,7 @@ public class VerboseCommand extends SingleCommand {
                     Message.VERBOSE_RESULTS_URL.send(sender);
 
                     Component message = TextComponent.builder(url).color(TextColor.AQUA)
-                            .clickEvent(new ClickEvent(ClickEvent.Action.OPEN_URL, String.valueOf(url)))
+                            .clickEvent(new ClickEvent(ClickEvent.Action.OPEN_URL, url))
                             .hoverEvent(new HoverEvent(HoverEvent.Action.SHOW_TEXT, TextComponent.of("Click to open the results page.").color(TextColor.GRAY)))
                             .build();
 
diff --git a/common/src/main/java/me/lucko/luckperms/common/commands/user/UserInfo.java b/common/src/main/java/me/lucko/luckperms/common/commands/user/UserInfo.java
index 7f6860b8..75742fbd 100644
--- a/common/src/main/java/me/lucko/luckperms/common/commands/user/UserInfo.java
+++ b/common/src/main/java/me/lucko/luckperms/common/commands/user/UserInfo.java
@@ -54,7 +54,6 @@ public class UserInfo extends SubCommand<User> {
         super(CommandSpec.USER_INFO.localize(locale), "info", CommandPermission.USER_INFO, Predicates.alwaysFalse());
     }
 
-    @SuppressWarnings("unchecked")
     @Override
     public CommandResult execute(LuckPermsPlugin plugin, Sender sender, User user, List<String> args, String label) {
         if (ArgumentPermissions.checkViewPerms(plugin, sender, getPermission().get(), user)) {
diff --git a/common/src/main/java/me/lucko/luckperms/common/context/ContextManager.java b/common/src/main/java/me/lucko/luckperms/common/context/ContextManager.java
index f4ffb22e..34cede38 100644
--- a/common/src/main/java/me/lucko/luckperms/common/context/ContextManager.java
+++ b/common/src/main/java/me/lucko/luckperms/common/context/ContextManager.java
@@ -196,7 +196,6 @@ public abstract class ContextManager<T> {
         for (ContextCalculator<? super T> calculator : ContextManager.this.calculators) {
             try {
                 MutableContextSet ret = calculator.giveApplicableContext(subject, accumulator);
-                //noinspection ConstantConditions
                 if (ret == null) {
                     throw new IllegalStateException(calculator.getClass() + " returned a null context set");
                 }
@@ -216,7 +215,6 @@ public abstract class ContextManager<T> {
         for (StaticContextCalculator calculator : this.staticCalculators) {
             try {
                 MutableContextSet ret = calculator.giveApplicableContext(accumulator);
-                //noinspection ConstantConditions
                 if (ret == null) {
                     throw new IllegalStateException(calculator.getClass() + " returned a null context set");
                 }
diff --git a/common/src/main/java/me/lucko/luckperms/common/locale/LocaleManager.java b/common/src/main/java/me/lucko/luckperms/common/locale/LocaleManager.java
index 88c98831..7a720078 100644
--- a/common/src/main/java/me/lucko/luckperms/common/locale/LocaleManager.java
+++ b/common/src/main/java/me/lucko/luckperms/common/locale/LocaleManager.java
@@ -75,7 +75,7 @@ public class LocaleManager {
             EnumMap<Message, String> messages = new EnumMap<>(Message.class);
             EnumMap<CommandSpec, CommandSpecData> commands = new EnumMap<>(CommandSpec.class);
 
-            Map<String, Object> data = (Map<String, Object>) new Yaml().load(reader);
+            Map<String, Object> data = new Yaml().load(reader);
             for (Map.Entry<String, Object> entry : data.entrySet()) {
                 if (entry.getKey() == null || entry.getKey().isEmpty() || entry.getValue() == null) {
                     continue;
diff --git a/common/src/main/java/me/lucko/luckperms/common/node/model/ImmutableNode.java b/common/src/main/java/me/lucko/luckperms/common/node/model/ImmutableNode.java
index 416dfe4e..f27498e3 100644
--- a/common/src/main/java/me/lucko/luckperms/common/node/model/ImmutableNode.java
+++ b/common/src/main/java/me/lucko/luckperms/common/node/model/ImmutableNode.java
@@ -327,8 +327,8 @@ public final class ImmutableNode implements Node {
                         o1.permission == o2.permission &&
                         o1.value == o2.value &&
                         o1.override == o2.override &&
-                        (o1.server == null ? o2.server == null : o1.server.equals(o2.server)) &&
-                        (o1.world == null ? o2.world == null : o1.world.equals(o2.world)) &&
+                        Objects.equals(o1.server, o2.server) &&
+                        Objects.equals(o1.world, o2.world) &&
                         o1.expireAt == o2.expireAt &&
                         o1.getContexts().equals(o2.getContexts());
             }
@@ -339,8 +339,8 @@ public final class ImmutableNode implements Node {
                 return o1 == o2 ||
                         o1.permission == o2.permission &&
                         o1.override == o2.override &&
-                        (o1.server == null ? o2.server == null : o1.server.equals(o2.server)) &&
-                        (o1.world == null ? o2.world == null : o1.world.equals(o2.world)) &&
+                        Objects.equals(o1.server, o2.server) &&
+                        Objects.equals(o1.world, o2.world) &&
                         o1.expireAt == o2.expireAt &&
                         o1.getContexts().equals(o2.getContexts());
             }
@@ -352,8 +352,8 @@ public final class ImmutableNode implements Node {
                         o1.permission == o2.permission &&
                         o1.value == o2.value &&
                         o1.override == o2.override &&
-                        (o1.server == null ? o2.server == null : o1.server.equals(o2.server)) &&
-                        (o1.world == null ? o2.world == null : o1.world.equals(o2.world)) &&
+                        Objects.equals(o1.server, o2.server) &&
+                        Objects.equals(o1.world, o2.world) &&
                         o1.isTemporary() == o2.isTemporary() &&
                         o1.getContexts().equals(o2.getContexts());
             }
@@ -364,8 +364,8 @@ public final class ImmutableNode implements Node {
                 return o1 == o2 ||
                         o1.permission == o2.permission &&
                         o1.override == o2.override &&
-                        (o1.server == null ? o2.server == null : o1.server.equals(o2.server)) &&
-                        (o1.world == null ? o2.world == null : o1.world.equals(o2.world)) &&
+                        Objects.equals(o1.server, o2.server) &&
+                        Objects.equals(o1.world, o2.world) &&
                         o1.isTemporary() == o2.isTemporary() &&
                         o1.getContexts().equals(o2.getContexts());
             }
@@ -376,8 +376,8 @@ public final class ImmutableNode implements Node {
                 return o1 == o2 ||
                         o1.permission == o2.permission &&
                         o1.override == o2.override &&
-                        (o1.server == null ? o2.server == null : o1.server.equals(o2.server)) &&
-                        (o1.world == null ? o2.world == null : o1.world.equals(o2.world)) &&
+                        Objects.equals(o1.server, o2.server) &&
+                        Objects.equals(o1.world, o2.world) &&
                         o1.getContexts().equals(o2.getContexts());
             }
         };
diff --git a/common/src/main/java/me/lucko/luckperms/common/node/model/NodeHeldPermission.java b/common/src/main/java/me/lucko/luckperms/common/node/model/NodeHeldPermission.java
index de2dfeab..7554e091 100644
--- a/common/src/main/java/me/lucko/luckperms/common/node/model/NodeHeldPermission.java
+++ b/common/src/main/java/me/lucko/luckperms/common/node/model/NodeHeldPermission.java
@@ -71,15 +71,13 @@ public final class NodeHeldPermission<T extends Comparable<T>> implements HeldPe
         return this.node.getWorld();
     }
 
-    @NonNull
     @Override
-    public OptionalLong getExpiry() {
+    public @NonNull OptionalLong getExpiry() {
         return this.node.isTemporary() ? OptionalLong.of(this.node.getExpiryUnixTime()) : OptionalLong.empty();
     }
 
-    @NonNull
     @Override
-    public ContextSet getContexts() {
+    public @NonNull ContextSet getContexts() {
         return this.node.getContexts();
     }
 
diff --git a/common/src/main/java/me/lucko/luckperms/common/sender/AbstractSender.java b/common/src/main/java/me/lucko/luckperms/common/sender/AbstractSender.java
index 88090edd..4ca86472 100644
--- a/common/src/main/java/me/lucko/luckperms/common/sender/AbstractSender.java
+++ b/common/src/main/java/me/lucko/luckperms/common/sender/AbstractSender.java
@@ -91,7 +91,6 @@ public final class AbstractSender<T> implements Sender {
         }
     }
 
-    @SuppressWarnings("deprecation")
     @Override
     public void sendMessage(Component message) {
         if (isConsole()) {
diff --git a/common/src/main/java/me/lucko/luckperms/common/sender/DummySender.java b/common/src/main/java/me/lucko/luckperms/common/sender/DummySender.java
index 8063eade..304409ef 100644
--- a/common/src/main/java/me/lucko/luckperms/common/sender/DummySender.java
+++ b/common/src/main/java/me/lucko/luckperms/common/sender/DummySender.java
@@ -56,7 +56,6 @@ public abstract class DummySender implements Sender {
         consumeMessage(message);
     }
 
-    @SuppressWarnings("deprecation")
     @Override
     public void sendMessage(Component message) {
         consumeMessage(TextUtils.toLegacy(message));
diff --git a/common/src/main/java/me/lucko/luckperms/common/util/ImmutableCollectors.java b/common/src/main/java/me/lucko/luckperms/common/util/ImmutableCollectors.java
index 67395d39..42083424 100644
--- a/common/src/main/java/me/lucko/luckperms/common/util/ImmutableCollectors.java
+++ b/common/src/main/java/me/lucko/luckperms/common/util/ImmutableCollectors.java
@@ -63,7 +63,6 @@ public final class ImmutableCollectors {
     }
 
     public static <T extends Enum<T>> Collector<T, EnumSet<T>, ImmutableSet<T>> toEnumSet(Class<T> clazz) {
-        //noinspection unchecked
         return Collector.of(
                 () -> EnumSet.noneOf(clazz),
                 EnumSet::add,
diff --git a/common/src/main/java/me/lucko/luckperms/common/util/LoadingMap.java b/common/src/main/java/me/lucko/luckperms/common/util/LoadingMap.java
index c4364fae..61ca9c6e 100644
--- a/common/src/main/java/me/lucko/luckperms/common/util/LoadingMap.java
+++ b/common/src/main/java/me/lucko/luckperms/common/util/LoadingMap.java
@@ -63,6 +63,7 @@ public class LoadingMap<K, V> extends ForwardingMap<K, V> implements Map<K, V> {
         if (value != null) {
             return value;
         }
+        //noinspection unchecked
         return this.map.computeIfAbsent((K) key, this.function);
     }
 }
\ No newline at end of file
diff --git a/common/src/main/java/me/lucko/luckperms/common/verbose/VerboseHandler.java b/common/src/main/java/me/lucko/luckperms/common/verbose/VerboseHandler.java
index 95d80ade..3f0de026 100644
--- a/common/src/main/java/me/lucko/luckperms/common/verbose/VerboseHandler.java
+++ b/common/src/main/java/me/lucko/luckperms/common/verbose/VerboseHandler.java
@@ -79,7 +79,6 @@ public class VerboseHandler extends RepeatingTask {
             return;
         }
 
-        //noinspection ThrowableNotThrown
         StackTraceElement[] trace = new Exception().getStackTrace();
 
         // add the check data to a queue to be processed later.
@@ -104,7 +103,6 @@ public class VerboseHandler extends RepeatingTask {
             return;
         }
 
-        //noinspection ThrowableNotThrown
         StackTraceElement[] trace = new Exception().getStackTrace();
 
         // add the check data to a queue to be processed later.
diff --git a/sponge/sponge-service-api6/src/main/java/me/lucko/luckperms/sponge/service/proxy/api6/DescriptionBuilder.java b/sponge/sponge-service-api6/src/main/java/me/lucko/luckperms/sponge/service/proxy/api6/DescriptionBuilder.java
index 5be56ca0..b22885ee 100644
--- a/sponge/sponge-service-api6/src/main/java/me/lucko/luckperms/sponge/service/proxy/api6/DescriptionBuilder.java
+++ b/sponge/sponge-service-api6/src/main/java/me/lucko/luckperms/sponge/service/proxy/api6/DescriptionBuilder.java
@@ -115,8 +115,8 @@ public final class DescriptionBuilder implements PermissionDescription.Builder,
 
         return this.container.equals(other.container) &&
                 this.roles.equals(other.roles) &&
-                (this.id == null ? other.id == null : this.id.equals(other.id)) &&
-                (this.description == null ? other.description == null : this.description.equals(other.description));
+                Objects.equals(this.id, other.id) &&
+                Objects.equals(this.description, other.description);
     }
 
     @Override
diff --git a/sponge/sponge-service-api7/src/main/java/me/lucko/luckperms/sponge/service/proxy/api7/DescriptionBuilder.java b/sponge/sponge-service-api7/src/main/java/me/lucko/luckperms/sponge/service/proxy/api7/DescriptionBuilder.java
index 4d68e3d7..8b843a2a 100644
--- a/sponge/sponge-service-api7/src/main/java/me/lucko/luckperms/sponge/service/proxy/api7/DescriptionBuilder.java
+++ b/sponge/sponge-service-api7/src/main/java/me/lucko/luckperms/sponge/service/proxy/api7/DescriptionBuilder.java
@@ -114,8 +114,8 @@ public final class DescriptionBuilder implements PermissionDescription.Builder,
 
         return this.container.equals(other.container) &&
                 this.roles.equals(other.roles) &&
-                (this.id == null ? other.id == null : this.id.equals(other.id)) &&
-                (this.description == null ? other.description == null : this.description.equals(other.description));
+                Objects.equals(this.id, other.id) &&
+                Objects.equals(this.description, other.description);
     }
 
     @Override
diff --git a/sponge/src/main/java/me/lucko/luckperms/sponge/service/ProxyFactory.java b/sponge/src/main/java/me/lucko/luckperms/sponge/service/ProxyFactory.java
index 3fe9798a..c0c3b756 100644
--- a/sponge/src/main/java/me/lucko/luckperms/sponge/service/ProxyFactory.java
+++ b/sponge/src/main/java/me/lucko/luckperms/sponge/service/ProxyFactory.java
@@ -45,7 +45,6 @@ public final class ProxyFactory {
     private static final boolean IS_API_7 = isApi7();
     private static boolean isApi7() {
         try {
-            //noinspection JavaReflectionMemberAccess
             Subject.class.getDeclaredMethod("asSubjectReference");
             return true;
         } catch (NoSuchMethodException e) {
diff --git a/sponge/src/main/java/me/lucko/luckperms/sponge/service/model/calculated/CalculatedSubjectData.java b/sponge/src/main/java/me/lucko/luckperms/sponge/service/model/calculated/CalculatedSubjectData.java
index 89f2549c..f2623d02 100644
--- a/sponge/src/main/java/me/lucko/luckperms/sponge/service/model/calculated/CalculatedSubjectData.java
+++ b/sponge/src/main/java/me/lucko/luckperms/sponge/service/model/calculated/CalculatedSubjectData.java
@@ -240,11 +240,7 @@ public class CalculatedSubjectData implements LPSubjectData {
         // flatten
         Set<LPSubjectReference> result = new LinkedHashSet<>();
         for (Set<LPSubjectReference> set : sorted.values()) {
-            for (LPSubjectReference e : set) {
-                if (!result.contains(e)) {
-                    result.add(e);
-                }
-            }
+            result.addAll(set);
         }
         return result;
     }
diff --git a/velocity/src/main/java/me/lucko/luckperms/velocity/VelocityCommandExecutor.java b/velocity/src/main/java/me/lucko/luckperms/velocity/VelocityCommandExecutor.java
index 6f87fe43..5722251e 100644
--- a/velocity/src/main/java/me/lucko/luckperms/velocity/VelocityCommandExecutor.java
+++ b/velocity/src/main/java/me/lucko/luckperms/velocity/VelocityCommandExecutor.java
@@ -51,7 +51,7 @@ public class VelocityCommandExecutor implements Command {
     }
 
     @Override
-    public void execute(@NonNull CommandSource source, String[] args) {
+    public void execute(@NonNull CommandSource source, @NonNull String[] args) {
         Sender lpSender = this.plugin.getSenderFactory().wrap(source);
         List<String> arguments = CommandManager.stripQuotes(ARGUMENT_SPLITTER.splitToList(ARGUMENT_JOINER.join(args)));
 
@@ -59,7 +59,7 @@ public class VelocityCommandExecutor implements Command {
     }
 
     @Override
-    public List<String> suggest(@NonNull CommandSource source, String[] args) {
+    public List<String> suggest(@NonNull CommandSource source, @NonNull String[] args) {
         Sender lpSender = this.plugin.getSenderFactory().wrap(source);
         List<String> arguments = CommandManager.stripQuotes(TAB_COMPLETE_ARGUMENT_SPLITTER.splitToList(ARGUMENT_JOINER.join(args)));