Employee group key & contradicts occupational code &

What causes this issue?

A contradiction between infotypes 0013 (Social Insurance) and 0020
(DEUEV) was detected in period &V3&.
Person group key &V1& is not allowed in combination with DEUEV
occupational code &V2&.

How to fix this error?

Use a permissible value in the "Person Group" field or change the DEUEV
occupational code.

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.