How do I assign a user ID to the purchasing group so it shows up on table..

How do I assign a user ID to the purchasing group so it shows up on table T024? I'm trying to create a STO but am recieving the following error

Configuration of User ID is not set up in purchasing group T024 table

Message no. 00398

Diagnosis

Placeholder for batch input error text, this message is not output.

Configuration of User ID is not set up in purchasing group T024 table

Thanks in advance