Change range must cover complete existence period

What causes this issue?

Field &V1& to be changed must be unique for the entire interval. You
selected a change interval which does not include the entire period.
Any change in the field would result in an inconsistency.

System Response

The SAP System rejects the entry.

How to fix this error?

Select a suitable change interval with the function "Analysis period".

Error message extract from SAP system. Copyright SAP SE.