No order groups exist for the entry

What causes this issue?

You have requested possible entries for the order groups. However, no
order groups have been created yet in the respective controlling area.

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?

Define order groups that meet your planning requirements, using the
hierarchy maintenance functions.

Error message extract from SAP system. Copyright SAP SE.