Server error causes infinite restart loop

Hello!

I have updated to the most recent version of SpongeForge, and I got the error below:

[Server thread/ERROR]: Encountered an unexpected exception
net.minecraft.util.ReportedException: Ticking entity
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:707) ~[MinecraftServer.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:344) ~[ko.class:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:605) ~[MinecraftServer.class:?]
at net.minecraft.server.MinecraftSe

rver.run(MinecraftServer.java:481) [MinecraftServer.class:?]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_45-internal]
Caused by: java.lang.IllegalArgumentException: A named cause already exists with the name: Attacker
at org.spongepowered.api.event.cause.Cause.fromList(Cause.java:266) ~[spongeforge-1.8.9-1732-3.1.0-BETA-1147.jar:1.8.9-1732-3.1.0-BETA-1147]
at org.spongepowered.api.event.cause.Cause.with(Cause.java:585) ~[spongeforge-1.8.9-1732-3.1.0-BETA-1147.jar:1.8.9-1732-3.1.0-BETA-1147]
at org.spongepowered.api.event.cause.Cause.with(Cause.java:562) ~[spongeforge-1.8.9-1732-3.1.0-BETA-1147.jar:1.8.9-1732-3.1.0-BETA-1147]
at net.minecraft.world.World.handleDroppedItems(World.java:1135) ~[adm.class:?]
at net.minecraft.world.World.handlePostTickCaptures(World.java:835) ~[adm.class:?]
at net.minecraft.world.World.onCallEntityUpdate(World.java:543) ~[adm.class:?]
at net.minecraft.world.World.func_72866_a(World.java:1860) ~[adm.class:?]
at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:699) ~[le.class:?]
at net.minecraft.world.World.func_72870_g(World.java:1829) ~[adm.class:?]
at net.minecraft.world.World.func_72939_s(World.java:1661) ~[adm.class:?]
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:544) ~[le.class:?]
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:701) ~[MinecraftServer.class:?]
… 4 more
[19:37:00] [Server thread/ERROR]: This crash report has been saved to: /data/service10855/data/service_item_137017/./crash-reports/crash-2016-02-10_19.37.00-server.txt

Now all that happens is the server goes into an infinite restart loop and it shows no errors, except with the first one seen above. Any ideas?

Could you paste the full log with either https://gist.github.com or another paste website.

See

Here is the full log:

Can you try with the latest SpongeForge build?