[13:49:55] [main/WARN]: Ambiguity between arguments [teleport, destination] and [teleport, targets] with inputs: [Player, 0123, @e, dd12be42-52a9-4a91-a8a1-11c01849e498]
[13:49:55] [main/WARN]: Ambiguity between arguments [teleport, location] and [teleport, destination] with inputs: [0.1 -0.5 .9, 0 0 0]
[13:49:55] [main/WARN]: Ambiguity between arguments [teleport, location] and [teleport, targets] with inputs: [0.1 -0.5 .9, 0 0 0]
[13:49:55] [main/WARN]: Ambiguity between arguments [teleport, targets] and [teleport, destination] with inputs: [Player, 0123, dd12be42-52a9-4a91-a8a1-11c01849e498]
[13:49:55] [main/WARN]: Ambiguity between arguments [teleport, targets, location] and [teleport, targets, destination] with inputs: [0.1 -0.5 .9, 0 0 0]
[13:49:55] [Server thread/INFO]: Starting minecraft server version 1.15.2
[13:49:55] [Server thread/INFO]: Loading properties
[13:49:55] [Server thread/INFO]: Default game type: SURVIVAL
[13:49:55] [Server thread/INFO]: Generating keypair
[13:49:55] [Server thread/INFO]: Starting Minecraft server on *:25565
[13:49:55] [Server thread/INFO]: Using default channel type
[13:49:55] [Server thread/INFO]: Preparing level "world"
[13:49:56] [Server thread/INFO]: Reloading ResourceManager: Default
[13:49:59] [Server thread/INFO]: Loaded 6 recipes
[13:50:00] [Server thread/INFO]: Loaded 825 advancements
[13:50:00] [Server thread/INFO]: Preparing start region for dimension minecraft:overworld
[13:50:00] [Server thread/INFO]: Preparing spawn area: 0%
[13:50:01] [Server-Worker-6/INFO]: Preparing spawn area: 0%
[13:50:01] [Server-Worker-2/INFO]: Preparing spawn area: 0%
[13:50:01] [Server thread/INFO]: Preparing spawn area: 0%
[13:50:02] [Server thread/INFO]: Preparing spawn area: 0%
[13:50:02] [Server-Worker-4/INFO]: Preparing spawn area: 0%
[13:50:03] [Server-Worker-1/INFO]: Preparing spawn area: 0%
[13:50:03] [Server-Worker-4/WARN]: Server-Worker-4 died
java.util.concurrent.CompletionException: q: Exception generating new chunk
	at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:314) ~[?:?]
	at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:319) ~[?:?]
	at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1081) ~[?:?]
	at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:478) ~[?:?]
	at wr.b(SourceFile:58) ~[server.jar:?]
	at aiv.e(SourceFile:83) ~[server.jar:?]
	at aiv.a(SourceFile:123) ~[server.jar:?]
	at aiv.run(SourceFile:91) ~[server.jar:?]
	at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1426) ~[?:?]
	at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290) ~[?:?]
	at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020) ~[?:?]
	at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656) ~[?:?]
	at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594) ~[?:?]
	at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177) [?:?]
Caused by: q: Exception generating new chunk
	at wp.a(SourceFile:560) ~[server.jar:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[server.jar:?]
	at wp.a(SourceFile:543) ~[server.jar:?]
	at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1072) ~[?:?]
	... 11 more
Caused by: java.util.ConcurrentModificationException
	at java.util.HashMap.computeIfAbsent(HashMap.java:1134) ~[?:?]
	at cmo.b(SourceFile:67) ~[server.jar:?]
	at cmo.a(SourceFile:57) ~[server.jar:?]
	at clm$a.a(SourceFile:219) ~[server.jar:?]
	at clm$a.<init>(SourceFile:205) ~[server.jar:?]
	at clm.a(SourceFile:183) ~[server.jar:?]
	at clm.a(SourceFile:124) ~[server.jar:?]
	at cll$a.a(SourceFile:68) ~[server.jar:?]
	at caa.a(SourceFile:199) ~[server.jar:?]
	at cae.d(SourceFile:51) ~[server.jar:?]
	at cae.a(SourceFile:214) ~[server.jar:?]
	at wp.a(SourceFile:549) ~[server.jar:?]
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[server.jar:?]
	at wp.a(SourceFile:543) ~[server.jar:?]
	at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1072) ~[?:?]
	... 11 more