There is no planning data to be inherited

What causes this issue?

You tried to pass on planning data, even though there was no planning
data available. You cannot do this.

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?

Create planning data for this activity, if you want to pass planning
data to it.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.