The work item or work item ID & does not exist

What causes this issue?

Work item ID &V1& does not exist.

System Response

You are using an account assignment object that does not exist.

How to fix this error?

Create a corresponding work item or work item ID.

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.