If I add a custom item to my character, then make a copy of that character, the custom item is duplicated. Attempts to delete the duplicated item result in the following error code:
I can confirm that this happens. Furthermore, for testing I made 2 custom items, one in Equipment and the other in Backpack. Both custom items were duplicated when I copied the character, but the duplicate of the one in the Backpack wound up in Equipment. Oddly enough, I was able to move that duplicate from Equipment to Backpack and back. I then tried deleting it, which was successful.
Next I deleted the Equipment custom item and its duplicate, and that caused the Zombie Beholder error. I got this error in the browser console:
If I add a custom item to my character, then make a copy of that character, the custom item is duplicated. Attempts to delete the duplicated item result in the following error code:
version
I can confirm that this happens. Furthermore, for testing I made 2 custom items, one in Equipment and the other in Backpack. Both custom items were duplicated when I copied the character, but the duplicate of the one in the Backpack wound up in Equipment. Oddly enough, I was able to move that duplicate from Equipment to Backpack and back. I then tried deleting it, which was successful.
Next I deleted the Equipment custom item and its duplicate, and that caused the Zombie Beholder error. I got this error in the browser console:
The request fields had partyID: null; the other 3 fields had proper number values.
I then tried moving the duplicate to Backpack, it moved fine, then I deleted it, no Error.
So it seems you can delete the duplicate item once you've Moved it to another container. And I hope my troubleshooting info is helpful for the devs.
Helpful rewriter of Japanese->English translation and delver into software codebases (she/e/they)