Object type S infotype 1001 cannot be maintained via basic transaction

Hello

I am facing the below error below message while maintaining infotype-1001 for position." Can some please help me to fix this issue.

"Object type S infotype 1001 cannot be maintained via basic transaction

Message no. 5A263

Diagnosis

In accordance with the entries in tables T77CD (Infotypes - Customer- Specific Settings) and T777I (Infotypes per Object Type), you cannot use the detail maintenance function to process this infotype"

Thank you

Bob