Inconsistency: there are &2 active phy. inv. doc. items for material &1

What causes this issue?

Open and active inventory document items for the material &V1&
&V2& were determined by the system. It cannot decide which one of
these items should be updated.

System Response

The system cannot update this intermediate document item.

How to fix this error?

There is inconsistency in the database, please contact your system
administrator.

Error message extract from SAP system. Copyright SAP SE.