PGI error - No accounts maintained for Company code clearing

Dear Experts,

While doing PGI we are getting error "No accounts maintained for company code clearing between company codes 1010 and 2020". We are not doing intercompany STO scenario. We are just transferring stock from one sloc to another sloc within the same plant. Physically both slocs are in different location but in SAP we are showing it in same plant. Since it is not inter company STO so we have not maintained any OBYA settings. Not sure what other settings need to be maintained. Any help would be highly appreciated.

Regards,

Karan