MySQL duplication error

[sgdc3]

[22:15:13] [ChangeSkin Pool Thread #349/ERROR] [ChangeSkin]: Failed to save preferences for: UserPreference{rowId=-1, uuid=c569de66-2d18-39d6-bc27-7e93041f8dc8, targetSkin=SkinModel{rowId=3891679, encodedValue='ewogICJ0aW1lc3RhbXAiIDogMTYwNTczNDEwNjczOSwKICAicHJvZmlsZUlkIiA6ICI4Y2E3N2EzOGQzMGI0NDcwYTgyN2YzMmEzMTQ0ZGYyMCIsCiAgInByb2ZpbGVOYW1lIiA6ICJHYWJib19UaGVfQmVzdCIsCiAgInNpZ25hdHVyZVJlcXVpcmVkIiA6IHRydWUsCiAgInRleHR1cmVzIiA6IHsKICAgICJTS0lOIiA6IHsKICAgICAgInVybCIgOiAiaHR0cDovL3RleHR1cmVzLm1pbmVjcmFmdC5uZXQvdGV4dHVyZS85MGZkZDlmOTRkN2U2M2I0MTQ1ZTRhZGY2NTczODExZDlhOWYyY2ZhM2VhOGNlODk2NzBiNjQ0ODYxZmE2OTMwIiwKICAgICAgIm1ldGFkYXRhIiA6IHsKICAgICAgICAibW9kZWwiIDogInNsaW0iCiAgICAgIH0KICAgIH0KICB9Cn0=', encodedSignature='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', timestamp=1605734106739, profileId=8ca77a38-d30b-4470-a827-f32a3144df20, profileName='Gabbo_The_Best', signatureRequired=true, textures={SKIN=TextureModel{url='http://textures.minecraft.net/texture/90fdd9f94d7e63b4145e4adf6573811d9a9f2cfa3ea8ce89670b644861fa6930', metadata={model=slim}}}}, keepSkin=false}
com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry 'c569de662d1839d6bc277e93041f8dc8' for key 'UUID'
	at jdk.internal.reflect.GeneratedConstructorAccessor64.newInstance(Unknown Source) ~[?:?]
	at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:?]
	at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500) ~[?:?]
	at java.lang.reflect.Constructor.newInstance(Constructor.java:481) ~[?:?]
	at com.mysql.jdbc.Util.handleNewInstance(Util.java:425) ~[Waterfall-b384.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:1d2221d:384]
	at com.mysql.jdbc.Util.getInstance(Util.java:408) ~[Waterfall-b384.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:1d2221d:384]
	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:936) ~[Waterfall-b384.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:1d2221d:384]
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3933) ~[Waterfall-b384.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:1d2221d:384]
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3869) ~[Waterfall-b384.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:1d2221d:384]
	at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2524) ~[Waterfall-b384.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:1d2221d:384]
	at com.mysql.jdbc.ServerPreparedStatement.serverExecute(ServerPreparedStatement.java:1281) ~[Waterfall-b384.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:1d2221d:384]
	at com.mysql.jdbc.ServerPreparedStatement.executeInternal(ServerPreparedStatement.java:787) ~[Waterfall-b384.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:1d2221d:384]
	at com.mysql.jdbc.PreparedStatement.executeUpdateInternal(PreparedStatement.java:2133) ~[Waterfall-b384.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:1d2221d:384]
	at com.mysql.jdbc.PreparedStatement.executeUpdateInternal(PreparedStatement.java:2067) ~[Waterfall-b384.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:1d2221d:384]
	at com.mysql.jdbc.PreparedStatement.executeLargeUpdate(PreparedStatement.java:5175) ~[Waterfall-b384.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:1d2221d:384]
	at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2052) ~[Waterfall-b384.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:1d2221d:384]
	at changeskin.hikari.pool.ProxyPreparedStatement.executeUpdate(ProxyPreparedStatement.java:61) ~[?:?]
	at changeskin.hikari.pool.HikariProxyPreparedStatement.executeUpdate(HikariProxyPreparedStatement.java) ~[?:?]
	at com.github.games647.changeskin.core.SkinStorage.save(SkinStorage.java:225) ~[?:?]
	at com.github.games647.changeskin.bungee.listener.AbstractSkinListener.lambda$save$0(AbstractSkinListener.java:31) ~[?:?]
	at net.md_5.bungee.scheduler.BungeeTask.run(BungeeTask.java:66) ~[Waterfall-b384.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:1d2221d:384]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) ~[?:?]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) ~[?:?]