Field SPMON in the field catalog required validity period (Customizing)

What causes this issue?

In Customizing for application &V1&, aggregation type &V2&, scope of
message &V3&, a field catalog is defined that contains field "SPMON"
but not fields "DATAB" and "DATBI".

System Response

To avoid processing errors, this setting is not allowed.

How to fix this error?

Add fields "DATAB" and "DATBI" to the field catalog, or remove field
"SPMON".

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.