For example Extension field value on Purchase request is getting disappeared when Supplier is chosen in Assign source of supply screen.
SAP Business ByDesign
Other extension scenario is enabled. so value is being overwritten by one of the other extension scenarios.
In the further usage of extension field in Purchase request, the below changes are required:
Since you want details entered in Purchase request to flow to other documents,so you have to check mark relevant extension scenario given below only
Purchase request- Item to XXX - Root
All other scenarios scenarios appearing like ' XXX- Root to Purchase order-Root" has to be deactivated, cause system tried to pick from one of them and it finds no details.(where XXX can be other documents )
Note: Once all above changes are done, please create new Purchase order and Supplier invoices so that changes can be reflected.
KBA 2909846 - Extension field value not flown from one document to another
KBA , SRD-SRM-PRO , Purchase Requests and Orders , AP-SIP , Supplier Invoice Processing , Problem