Contract data cannot be edited for document type &1

What causes this issue?

The referencing procedure &V2& contains contract data fields.

System Response

According to the settings in Customizing, creating contract data has
not been defined for document type &V1&.
The system deletes the reference to master contract &V3&.

How to fix this error?

You can only create the reference by changing Customizing so that
contract data can be used for that document type, or by deleting the
fields for table VEDA in the referencing procedure.

Error message extract from SAP system. Copyright SAP SE.