@Angry Turret You're right. I noticed too when I fixing that error. Since bk3k's inventory does not update since 2020, and most likely it won't get any bug fixes. I just keep the below comment to give information for the players may face same errors like me. I did report the error to bk3k, but he eon't likely to fix it.

@SealonBoard This item is from ERM itself, not this patch, so this bug will likely appear regardless unless it's fixed on bk3k's side.

Hmmmm. It seems "centens-andraveihanheart" is unobtainable while using bk3k's inventory. The item drops, but it never go inside of the inventory.

And find it, and solved by myself.
bk3k only put centens-andraveihanheart to main bag's blacklist, not put at the weapons bag.

@Kangarus There should be no compatibility difference between the two versions of ERM, as this patch doesn't add too much this far.

Does this work with the Elithian Races mod version from the Github?

Huzzah!