Specified KPI input and formula combination is invalid

What causes this issue?

The formula you specified in Customizing is not valid for the
calculation input.
This message was raised from the <LS>My Objects</> content block of the
<LS>Planner's Home Page</>.

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?

In Customizing for <LS>Advanced Planning and Optimization</>, under
<LS>Supply Chain Planning </>-> <LS>Settings for the Planner's Home Page
</>-> <LS>My Objects</> -><LS> Maintain Key Performance Indicators
(KPIs)</>, in the <LS>KPI Definition for PP/DS</> view, select a valid
combination in the <LS>KPI Input </>and <LS>KPI Formula </>fields. (Use
the<PF> </>input help).

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.