Enter valid details to determine condition types for pricing

What causes this issue?

Purchasing organization and supplier details are mandatory to determine
condition types for pricing.

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?

Enter valid values for the following:
?,,Purchasing organization
?,,Supplier

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.