Adding Primary Location in F41021

Hi All,

An user has not defined primary location at the time of 'Item B/P declaration'-P41026

due to this we system is not allowing any sales order as there is no primary location defined in f41021 .

I am neither able to add primary location from 'P41024' due to error message 'Primary location does exist for Item' 

Please Advice

Thanks in Advance.

Regards,

Kautily