Business partner &1 has status '&2'

What causes this issue?

The business partner &V1& was added to the partner list of an issue or
an activity. This business partner has the status &V2&.

System Response

The system issued a warning about the status.

How to fix this error?

Check if the status of the business partner is correct. You can check
this using the business partner maintenance transaction <LB>BP</>.

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.