Unknown Error in PA0021 for Gender

Hello Experts,

I have an issue with saving Infotype 21 details via ECC. From Portal it is working fine..

I have used UnDeclared as Gender Choice.

In the backend it got saved as Unknown. Which is standard SAP.

But when you create the record in the backend, choosing Gender as "Unknown" it is now giving error.

Below are domain values stored for FASEX.

Please help me in finding if there is any note regarding this fix or do we need to manually do code correction.

Regards,

Priit