DBDUPNULCOL, Discarding kkkk=vvvv key due to duplicate null collation record
MUPIP Error: This idicates that MUPIP LOAD discarded a key-value pair from a binary EXTRACT because it contained conflicting empty string subscripts. This can only happen is someone changes the "Null" subscript representation used by a database while it contains such subscripts. FIS recommends against such a change.
Action: Determine whether the described data has value and restore it, typically with a SET command, appropriately.