Server crash on full loggout

I have a Sponge Forge server set up with API 5 running forge 2477. I have code chicken installed and when everyone logged out of the server it crashed giving me a stack dump:

/* Object: CapturedEntitiesSupplier{Captured=0} /
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- Name: CapturedBlocks /
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Object: CapturedBlocksSupplier{Captured=0} /
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Minecraft : 1.10.2 /
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SpongeAPI : 5.2.0-SNAPSHOT-c675e80 /
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SpongeForge : 1.10.2-2477-5.2.0-BETA-2637 /
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Minecraft Forge : 12.18.3.2477 /
/**/
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Unexpected /
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/
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Sponge’s tracking system is very dependent on /
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knowing whena change to any world takes place, /
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however, we have been toldto complete a “phase” /
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without having entered any phases.This is an error /
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usually on Sponge’s part, so a reportis required /
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on the issue tracker on GitHub. /
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/
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StackTrace: /
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java.lang.Exception: null /
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org.spongepowered.common.event.tracking.CauseTracker.printEmptyStackOnCompletion(CauseTracker.java:291) /
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org.spongepowered.common.event.tracking.CauseTracker.completePhase(CauseTracker.java:192) /
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org.spongepowered.common.world.WorldManager.unloadWorld(WorldManager.java:529) /
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net.minecraftforge.common.DimensionManager.setWorld(DimensionManager.java:656) /
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net.minecraft.server.MinecraftServer.func_71260_j(MinecraftServer.java:407) /
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net.minecraft.server.MinecraftServer$4.run(MinecraftServer.java:1512) /
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Minecraft : 1.10.2 /
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SpongeAPI : 5.2.0-SNAPSHOT-c675e80 /
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SpongeForge : 1.10.2-2477-5.2.0-BETA-2637 /
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Minecraft Forge : 12.18.3.2477 /
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**************************************************************************************************************/

Would you be able to provide the full crash report? (Preferably on gist or pastebin…).