I have copied HRESS_CC_PER_OVR_PERSDATA_XX and HRESS_CC_PER_DTL_PERSDATA_XX to Z objects and also changed the feeder paramters to be IT0002_10. Changed all the wires to reference the Z objects as well. (Realized later that I could have just changed the US objects, but that's a different story)
When I go to the edit screen, one of the fields we want to change is KNZNM. I have added that field as a dropdown and it is functioning on the UI properly, however, if I change the value and save, all the fields I've changed for IT0002 update except for this one.