[18:17:01] [main/WARN]: Ambiguity between arguments [teleport, destination] and [teleport, targets] with inputs: [Player, 0123, @e, dd12be42-52a9-4a91-a8a1-11c01849e498]
[18:17:01] [main/WARN]: Ambiguity between arguments [teleport, location] and [teleport, destination] with inputs: [0.1 -0.5 .9, 0 0 0]
[18:17:01] [main/WARN]: Ambiguity between arguments [teleport, location] and [teleport, targets] with inputs: [0.1 -0.5 .9, 0 0 0]
[18:17:01] [main/WARN]: Ambiguity between arguments [teleport, targets] and [teleport, destination] with inputs: [Player, 0123, dd12be42-52a9-4a91-a8a1-11c01849e498]
[18:17:01] [main/WARN]: Ambiguity between arguments [teleport, targets, location] and [teleport, targets, destination] with inputs: [0.1 -0.5 .9, 0 0 0]
[18:17:01] [Server thread/INFO]: Starting minecraft server version 20w09a
[18:17:01] [Server thread/INFO]: Loading properties
[18:17:01] [Server thread/INFO]: Default game type: SURVIVAL
[18:17:01] [Server thread/INFO]: Generating keypair
[18:17:01] [Server thread/INFO]: Starting Minecraft server on *:25565
[18:17:01] [Server thread/INFO]: Using epoll channel type
[18:17:02] [Server thread/WARN]: Failed to save operators list: 
java.lang.IllegalArgumentException: class zu declares multiple JSON fields named a
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:170) ~[server.jar:?]
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:100) ~[server.jar:?]
        at com.google.gson.Gson.getAdapter(Gson.java:423) ~[server.jar:?]
        at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:56) ~[server.jar:?]
        at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java:97) ~[server.jar:?]
        at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java:61) ~[server.jar:?]
        at com.google.gson.Gson.toJson(Gson.java:669) ~[server.jar:?]
        at com.google.gson.Gson.toJson(Gson.java:648) ~[server.jar:?]
        at com.google.gson.Gson.toJson(Gson.java:623) ~[server.jar:?]
        at zw.f(SourceFile:114) ~[server.jar:?]
        at wg.B(SourceFile:114) [server.jar:?]
        at wg.<init>(SourceFile:31) [server.jar:?]
        at wh.d(SourceFile:186) [server.jar:?]
        at net.minecraft.server.MinecraftServer.run(SourceFile:634) [server.jar:?]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_242]