For the purchase of raw material there are 2 PREQ document Types are decided:
ZUNB- that will used for the preq generated by MRP.
ZMAN- that will be used by users manually
When MRP is run, the system always proposes NB document type for PREQ. A new document type ZUNB is created for PREQ that are generated by MRP.
Requirement is that the system should purpose ZUNB instead of NB when MRP is run.
Where can this be changed?