Internal server error

I don’t know how happened, but now i get this error when i try to join the server…

    Failed to handle packet for /IP:PORT
org.spongepowered.api.registry.CatalogTypeAlreadyRegisteredException
        at org.spongepowered.common.world.SpongeWorldArchetypeBuilder.lambda$build$0(SpongeWorldArchetypeBuilder.java:243) ~[SpongeWorldArchetypeBuilder.class:1.10.2-2171-5.1.0-BETA-2003]
        at java.util.Optional.ifPresent(Optional.java:159) ~[?:1.8.0_111]
        at org.spongepowered.common.world.SpongeWorldArchetypeBuilder.build(SpongeWorldArchetypeBuilder.java:242) ~[SpongeWorldArchetypeBuilder.class:1.10.2-2171-5.1.0-BETA-2003]
        at net.minecraftforge.common.DimensionManager.initDimension(DimensionManager.java:197) ~[DimensionManager.class:?]
        at net.minecraft.server.MinecraftServer.func_71218_a(MinecraftServer.java:69) ~[MinecraftServer.class:?]
        at net.minecraft.server.management.PlayerList.initializeConnectionToPlayer(PlayerList.java:249) ~[mp.class:?]
        at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher.completeServerSideConnection(NetworkDispatcher.java:260) ~[NetworkDispatcher.class:?]
        at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher.access$100(NetworkDispatcher.java:73) ~[NetworkDispatcher.class:?]
        at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher$1.func_73660_a(NetworkDispatcher.java:209) ~[NetworkDispatcher$1.class:?]
        at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:287) ~[eo.class:?]
        at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:180) [md.class:?]
        at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:732) [MinecraftServer.class:?]
        at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:387) [ld.class:?]
        at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:613) [MinecraftServer.class:?]
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:471) [MinecraftServer.class:?]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_111]

Fixed.
I think my world is corrupted.
But i have another problem…
My main world (Flat world) dimension is 1.34GB…
How is this possible?

Worlds grow with area - a Minecraft anvil/region file is usually around 4.5MB (rough estimate of my main server world) - meaning that you only need 300 .mca files in average to reach your world size. On any server with more than a few active players, this is very quickly reached. Especially if they go exploring, and even more so if you use a world gen plugin to preload chunks :slight_smile:

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