Welfare fund &1 is not part of any agreement

What causes this issue?

You have specified a Welfare Fund as an "original" Welfare Fund.
However, this Welfare Fund is not condidered an "original" Welfare Fund
since it does not work with the company owing to an agreement between
the same and a union.

System Response

The system does not allow this entry.

How to fix this error?

Specify a Welfare Fund that works by agreement.

Error message extract from SAP system. Copyright SAP SE.