K-1, Box 16 has entries for Codes B, E and G only. Error message says there are entries in Code K, and either Code I or Code J. What else can trigger this error?

I have tried creating multiple K-1s to break out the Box 16 items, but I receive that same error message when I have any 1 of the 3 Codes is entered. I have entered other K-1s without issue, but this one is kicking me. Help appreciated.