gistfile1.txt

> [23:41:09] [Server thread/FATAL] [minecraft/MinecraftServer]: Error executing task
java.util.concurrent.ExecutionException: java.lang.IllegalStateException: EntityItemDropsSupplier is already set!
at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_212]
at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:1.8.0_212]
at net.minecraft.util.Util.func_181617_a(SourceFile:47) [h.class:?]
at org.spongepowered.common.SpongeImplHooks.onUtilRunTask(SpongeImplHooks.java:308) [SpongeImplHooks.class:1.12.2-2838-7.1.7-RC0]
at net.minecraft.server.MinecraftServer.redirect$onRun$zjf000(MinecraftServer.java:4716) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:723) [MinecraftServer.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:397) [nz.class:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526) [MinecraftServer.class:?]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_212]
Caused by: java.lang.IllegalStateException: EntityItemDropsSupplier is already set!
at com.google.common.base.Preconditions.checkState(Preconditions.java:444) ~[minecraft_server.1.12.2.jar:?]
at org.spongepowered.common.event.tracking.PhaseContext.addEntityDropCaptures(PhaseContext.java:211) ~[PhaseContext.class:1.12.2-2838-7.1.7-RC0]
at org.spongepowered.common.event.tracking.phase.packet.inventory.BasicInventoryPacketState.populateContext(BasicInventoryPacketState.java:130) ~[BasicInventoryPacketState.class:1.12.2-2838-7.1.7-RC0]
at org.spongepowered.common.event.tracking.phase.packet.inventory.SwitchHotbarScrollState.populateContext(SwitchHotbarScrollState.java:64) ~[SwitchHotbarScrollState.class:1.12.2-2838-7.1.7-RC0]
at org.spongepowered.common.event.tracking.phase.packet.inventory.SwitchHotbarScrollState.populateContext(SwitchHotbarScrollState.java:57) ~[SwitchHotbarScrollState.class:1.12.2-2838-7.1.7-RC0]
at org.spongepowered.common.event.tracking.phase.packet.PacketPhase.populateContext(PacketPhase.java:232) ~[PacketPhase.class:1.12.2-2838-7.1.7-RC0]
at org.spongepowered.common.event.tracking.phase.packet.PacketPhaseUtil.onProcessPacket(PacketPhaseUtil.java:185) ~[PacketPhaseUtil.class:1.12.2-2838-7.1.7-RC0]
at net.minecraft.network.PacketThreadUtil$1.redirect$impl$redirectToPhaseTracker$zlb000(SourceFile:540) ~[hv$1.class:?]
at net.minecraft.network.PacketThreadUtil$1.run(SourceFile:13) ~[hv$1.class:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_212]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_212]
at net.minecraft.util.Util.func_181617_a(SourceFile:46) ~[h.class:?]
... 7 more