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via GitHub by Eufranio
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org.spongepowered.api.registry.CatalogTypeAlreadyRegisteredException: 	at org.spongepowered.common.world.SpongeWorldArchetypeBuilder.lambda$build$0(SpongeWorldArchetypeBuilder.java:243)	at java.util.Optional.ifPresent(Unknown Source)	at org.spongepowered.common.world.SpongeWorldArchetypeBuilder.build(SpongeWorldArchetypeBuilder.java:242)	at net.minecraftforge.common.DimensionManager.initDimension(DimensionManager.java:192)	at net.minecraft.server.MinecraftServer.func_71218_a(MinecraftServer.java:69)	at net.minecraft.server.management.PlayerList.initializeConnectionToPlayer(PlayerList.java:201)	at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher.completeServerSideConnection(NetworkDispatcher.java:260)	at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher.access$100(NetworkDispatcher.java:73)	at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher$1.func_73660_a(NetworkDispatcher.java:209)	at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:287)	at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:180)	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:732)	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:387)	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:613)	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:471)	at java.lang.Thread.run(Unknown Source)