CO08 - When I try to create a PO reference with SO using Tcode - CO08. CO object error

Problem Statement:

I americium trying to make a accumulation bid with notation to a income bid utilizing Tcode CO08. However, erstwhile executing the transaction, I brushwood the pursuing error:
"Sales bid has nary CO object."

I person attached a screenshot of the mistake connection for reference.

Can anyone suggest however I tin resoluteness this mistake and successfully make a accumulation order?