Transitions TCC import into UDF tied to selection list

Summary

configuration to import by process number a value into a UDF that is tied to a selection list

Content

Hello - I'm hoping anyone out there can assist with a basic TCC import.  I currently have a TCC import that updates transitions UDFs (text and date data types) but when I try updating any UDF that is tied to a selection list, I get the following message "More than one element has been found. Path: TransitionProcess.[UDF FIELD NAME].  I'm using the TransitionsProcess entity with a key of number (process number).  I ran an export by this key to confirm there is ONLY one process row being returned.  I've tried various levels of this UDF with and without search and