Cost center & activity type &: activity is 0

What causes this issue?

Activity planning in periods &V3& is not reconciled for cost center
&V1&, activity type &V2&. The plan activity of activity type &V2& is 0.
However, a receiver cost center was planned to use this activity
(scheduled activity).

System Response

The SAP System cannot calculate the activity price as this would
involve dividing by zero. In order to prevent subsequent errors and to
calculate the activity prices, the SAP System uses scheduled quantity
as activity quantity. Because this is a serious error, the SAP System
does not update the results.

How to fix this error?

Check planning for activity type &V2& in cost center &V1& and the
activity scheduled for period(s) &V3&.
<DS:TRAN.KP26>Activity Type Planning</>
<DS:TRAN.KP36>Secondary Cost Planning</>

Error message extract from SAP system. Copyright SAP SE.