Diagnosis
No characteristics have been assigned to process instruction &V1& forphase &V2& in the process order.
You cannot maintain the PI sheet.

Procedure
RESET N1
Set the PI sheet to "technically complete".
Assign characteristics to the process instruction in the process order.
INCLUDE 'NA_STREZ_NEU' OBJECT DOKU ID TX LANGUAGE E
Change process order
INCLUDE 'NA_PLNREZ_HINW' OBJECT DOKU ID TX LANGUAGE E
Change master recipe