Enter one business process or a group of business processes

What causes this issue?

You can either plan
one business process or
a group or business processes.

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?

Delete either the business process or the group of business processes,
or
Enter a value in one of the two fields.

Error message extract from SAP system. Copyright SAP SE.