First assortment declaration &1 has an incorrect status

What causes this issue?

The history of assortment declarations must be complete. The first
declaration must indicate the status 1 "NEU" on the declaration form.
If such a declaration is cancelled, a gap will result at the beginning
of the declaration history. In this case all following declarations
have to be cancelled.

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?

The best way to handle is the complete redeclaration of your assortment
beginning from a selected time. In addition all existing declarations
have to be cancelled first.

Error message extract from SAP system. Copyright SAP SE.