PC Trying to rename the Chum Bucket for resource pack

[CasualDon]

I've been trying to rename the Chum Bucket for a resource pack I'm working on, but the internal item name "ChumBucket" isn't seeming to work. The rest of the item names work fine but this one won't. I have also tried "BloodBucket" since the Chum Caster's internal item name is "BloodFishingRod" but it didn't work either. If someone can figure out the actual internal item name for the Chum Bucket, it'd be greatly appreciated.
P.S. I know this is probably the wrong place to post this, but I just made my account on here and don't have the permissions to post in the correct area.