In any case if you are using the Read PP master data in collective order scenario. Kindly Read the below message.
Some times we assume that system , will be reading the PP master data for both the Parent and child order and the order number will remain the same, infact SAP has valid reasons for doing the same and it will delete the Child order and create new order if the BOM can be read.( Refer Last line).
Additional checks are carried out when reading a new routing or BOM in a collective order.
Reading a New Routing
All the checks are carried out that are valid for reading in a single order.
If the routing can be read in again then the system only reads the routing for the individual production order that is currently being processed.
Reading a New BOM
- All the checks are carried out that are valid for reading in a single order.
- The checks are carried out for all the subordinate orders that are valid when reading a single order.
If the BOM can be read again the system sets a deletion indicator for all the subordinate orders and creates new orders.