Domain for data element & conflicts with base field

What causes this issue?

The data elements of the view field and the base field have different
domains.
This can have been caused by a different domain being allocated to the
base field or its data element.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Adopt the data element of the base field by switching off the
modification flag or allocate a data element which has the domain of the
base field to the view field.
All the possible data elements are displayed using the pushbutton for
possible entries.

Error message extract from SAP system. Copyright SAP SE.