No company code is assigned to sales organization &

What causes this issue?

The error analysis of the defective record found that the assignment of
a company code to a sales organization is missing.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

If you no longer need the assignment, delete the line.
Otherwise, maintain the assignment of company codes to sales
organizations. Then start the assignment again.

Error message extract from SAP system. Copyright SAP SE.