MRP controller &2 does not exist in plant &1

What causes this issue?

The MRP controller &v2&, who you entered in the newtwork profile, does
not work in plant &v1&. Therefore you cannot create activities for the
WBS element.

System Response

INCLUDE 'NA_ALLG_NOVERARBEITUNG' OBJECT DOKU ID TX

How to fix this error?

INCLUDE 'NA_ALLG_MOEGLICH' OBJECT DOKU ID TX
Enter a correct MRP controller in the network profile.
Choose <ls>Settings -> Options</> and change the MRP controller on the
"Control" tab page.

Error message extract from SAP system. Copyright SAP SE.