Went to an older world, this ends up being spammed in my logs.
[2018-06-11 16:28:45] org.schema.game.server.data.PlayerNotFountException: Player not found: "CLIENT-ID(0) " [2018-06-11 16:28:45] at obfuscated.aUh.a(SourceFile:1371) [2018-06-11 16:28:45] at obfuscated.ajL.a(SourceFile:1001) [2018-06-11 16:28:45] at obfuscated.ajJ.a(SourceFile:811) [2018-06-11 16:28:45] at obfuscated.ajL.a(SourceFile:856) [2018-06-11 16:28:45] at obfuscated.ajD.a(SourceFile:569) [2018-06-11 16:28:45] at obfuscated.ajD.a(SourceFile:474) [2018-06-11 16:28:45] at obfuscated.ajD.a(SourceFile:223) [2018-06-11 16:28:45] at obfuscated.alq.updateLocal(SourceFile:611) [2018-06-11 16:28:45] at org.schema.game.common.controller.EditableSendableSegmentController.updateLocal(SourceFile:1098) [2018-06-11 16:28:45] at obfuscated.akv.updateLocal(SourceFile:171) [2018-06-11 16:28:45] at obfuscated.alC.updateLocal(SourceFile:534) [2018-06-11 16:28:45] at org.schema.game.server.controller.GameServerController.update(SourceFile:1374) [2018-06-11 16:28:45] at org.schema.schine.network.server.ServerController.run(SourceFile:275) [2018-06-11 16:28:45] at java.lang.Thread.run(Unknown Source)