Crashes from time to time

From 6.21 gas, the server crashes from time to time, About an hour to half an hour,please help me see the reason. thank you

This looks like a problem with the version of Yabba you are using:

java.util.ConcurrentModificationException at java.util.ArrayList$Itr.checkForComodification(Unknown Source) at java.util.ArrayList$ Source) at com.latmod.yabba.tile.TileItemBarrelConnector.insertItem(

OK, thank you. I’ll try another version of Yabba

It took me about half a month to get this

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