Document number & & & was already assigned

What causes this issue?

Document number &v2& in company code &v1& and fiscal year &v3& has
already been assigned.

System Response

Termination of processing.

How to fix this error?

Check document number range &v4& in company code &V1& and fiscal year
&v3& and correct the number range status if necessary.

Error message extract from SAP system. Copyright SAP SE.