Professional status & contradicts PI indicator &

What causes this issue?

A contradiction between infotypes 0013 (Social Insurance) and 0020
(DEUEV) was detected in period &V3&.
Entry &V1& in the "Occupational Status" field is not allowed in
combination with CI indicator &V2&.

How to fix this error?

Use a permissible value in the "Occupational Status" field or change the
SI contribution group key in infotype 0013.

Error message extract from SAP system. Copyright SAP SE.