diff --git a/common/src/main/java/me/lucko/luckperms/common/messaging/redis/RedisMessenger.java b/common/src/main/java/me/lucko/luckperms/common/messaging/redis/RedisMessenger.java
index e9e5ff69d..cfe9ac5a5 100644
--- a/common/src/main/java/me/lucko/luckperms/common/messaging/redis/RedisMessenger.java
+++ b/common/src/main/java/me/lucko/luckperms/common/messaging/redis/RedisMessenger.java
@@ -34,15 +34,12 @@ import redis.clients.jedis.DefaultJedisClientConfig;
 import redis.clients.jedis.HostAndPort;
 import redis.clients.jedis.JedisClientConfig;
 import redis.clients.jedis.JedisCluster;
-import redis.clients.jedis.JedisPool;
 import redis.clients.jedis.JedisPooled;
 import redis.clients.jedis.JedisPubSub;
 import redis.clients.jedis.Protocol;
 import redis.clients.jedis.UnifiedJedis;
-import redis.clients.jedis.exceptions.JedisClusterOperationException;
 
 import java.util.List;
-import java.util.Optional;
 import java.util.Set;
 import java.util.stream.Collectors;
 
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 0a72cd950..9d12ca53d 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
@@ -31,7 +31,12 @@ import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.TextComponent;
 import net.luckperms.api.util.Tristate;
 
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.UUID;
 
 /**
  * Simple implementation of {@link Sender} using a {@link SenderFactory}
diff --git a/common/src/main/java/me/lucko/luckperms/common/storage/implementation/sql/connection/file/H2ConnectionFactory.java b/common/src/main/java/me/lucko/luckperms/common/storage/implementation/sql/connection/file/H2ConnectionFactory.java
index b0c7808b2..cc36994ed 100644
--- a/common/src/main/java/me/lucko/luckperms/common/storage/implementation/sql/connection/file/H2ConnectionFactory.java
+++ b/common/src/main/java/me/lucko/luckperms/common/storage/implementation/sql/connection/file/H2ConnectionFactory.java
@@ -28,6 +28,7 @@ package me.lucko.luckperms.common.storage.implementation.sql.connection.file;
 import me.lucko.luckperms.common.dependencies.Dependency;
 import me.lucko.luckperms.common.plugin.LuckPermsPlugin;
 
+import java.io.IOException;
 import java.lang.reflect.Constructor;
 import java.nio.file.Files;
 import java.nio.file.Path;
@@ -123,6 +124,12 @@ public class H2ConnectionFactory extends FlatfileConnectionFactory {
 
             this.plugin.getLogger().warn("[DB Upgrade] Found an old (v1) H2 database file. LuckPerms will now attempt to upgrade it to v2 (this is a one time operation).");
 
+            try {
+                Files.deleteIfExists(tempMigrationFile);
+            } catch (IOException e) {
+                this.plugin.getLogger().warn("[DB Upgrade] Unable to delete temporary data from a previous migration attempt", e);
+            }
+
             this.plugin.getLogger().info("[DB Upgrade] Stage 1: Exporting the old database to an intermediary file...");
             Constructor<?> constructor = getConnectionConstructor();
             try (Connection c = getConnection(constructor, oldDatabase)) {
diff --git a/common/src/main/java/me/lucko/luckperms/common/storage/implementation/sql/connection/hikari/MariaDbConnectionFactory.java b/common/src/main/java/me/lucko/luckperms/common/storage/implementation/sql/connection/hikari/MariaDbConnectionFactory.java
index b41c203a6..142b0fc93 100644
--- a/common/src/main/java/me/lucko/luckperms/common/storage/implementation/sql/connection/hikari/MariaDbConnectionFactory.java
+++ b/common/src/main/java/me/lucko/luckperms/common/storage/implementation/sql/connection/hikari/MariaDbConnectionFactory.java
@@ -28,9 +28,7 @@ package me.lucko.luckperms.common.storage.implementation.sql.connection.hikari;
 import com.zaxxer.hikari.HikariConfig;
 import me.lucko.luckperms.common.storage.misc.StorageCredentials;
 
-import java.util.Map;
 import java.util.function.Function;
-import java.util.stream.Collectors;
 
 public class MariaDbConnectionFactory extends HikariConnectionFactory {
     public MariaDbConnectionFactory(StorageCredentials configuration) {
diff --git a/common/src/main/java/me/lucko/luckperms/common/storage/implementation/sql/connection/hikari/MySqlConnectionFactory.java b/common/src/main/java/me/lucko/luckperms/common/storage/implementation/sql/connection/hikari/MySqlConnectionFactory.java
index ce96742c5..81e1e989f 100644
--- a/common/src/main/java/me/lucko/luckperms/common/storage/implementation/sql/connection/hikari/MySqlConnectionFactory.java
+++ b/common/src/main/java/me/lucko/luckperms/common/storage/implementation/sql/connection/hikari/MySqlConnectionFactory.java
@@ -28,10 +28,6 @@ package me.lucko.luckperms.common.storage.implementation.sql.connection.hikari;
 import com.zaxxer.hikari.HikariConfig;
 import me.lucko.luckperms.common.storage.misc.StorageCredentials;
 
-import java.sql.Driver;
-import java.sql.DriverManager;
-import java.sql.SQLException;
-import java.util.Enumeration;
 import java.util.Map;
 import java.util.function.Function;
 
diff --git a/standalone/src/test/java/me/lucko/luckperms/standalone/CommandsIntegrationTest.java b/standalone/src/test/java/me/lucko/luckperms/standalone/CommandsIntegrationTest.java
index 9e29e3736..bd3e6f73e 100644
--- a/standalone/src/test/java/me/lucko/luckperms/standalone/CommandsIntegrationTest.java
+++ b/standalone/src/test/java/me/lucko/luckperms/standalone/CommandsIntegrationTest.java
@@ -46,7 +46,9 @@ import java.util.UUID;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
 
-import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 public class CommandsIntegrationTest {
     
diff --git a/standalone/src/test/java/me/lucko/luckperms/standalone/ImportExportIntegrationTest.java b/standalone/src/test/java/me/lucko/luckperms/standalone/ImportExportIntegrationTest.java
index 0da5ee7e3..2600033d5 100644
--- a/standalone/src/test/java/me/lucko/luckperms/standalone/ImportExportIntegrationTest.java
+++ b/standalone/src/test/java/me/lucko/luckperms/standalone/ImportExportIntegrationTest.java
@@ -51,7 +51,9 @@ import java.util.concurrent.TimeUnit;
 import java.util.zip.GZIPInputStream;
 
 import static org.awaitility.Awaitility.await;
-import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertNull;
 
 public class ImportExportIntegrationTest {
 
diff --git a/standalone/src/test/java/me/lucko/luckperms/standalone/IntegrationTest.java b/standalone/src/test/java/me/lucko/luckperms/standalone/IntegrationTest.java
index cde973c4d..278dacb58 100644
--- a/standalone/src/test/java/me/lucko/luckperms/standalone/IntegrationTest.java
+++ b/standalone/src/test/java/me/lucko/luckperms/standalone/IntegrationTest.java
@@ -40,7 +40,9 @@ import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
 
-import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 /**
  * A set of 'integration tests' for the standalone LuckPerms app.
diff --git a/standalone/src/test/java/me/lucko/luckperms/standalone/utils/CommandTester.java b/standalone/src/test/java/me/lucko/luckperms/standalone/utils/CommandTester.java
index d3ebf27be..bd6e16e93 100644
--- a/standalone/src/test/java/me/lucko/luckperms/standalone/utils/CommandTester.java
+++ b/standalone/src/test/java/me/lucko/luckperms/standalone/utils/CommandTester.java
@@ -35,7 +35,13 @@ import net.luckperms.api.util.Tristate;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
 import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.stream.Collectors;