SAP Message VK493 - Error: Inconsistent scale basis unit of measure in scale group &1

Diagnosis
A scale group contains condition records with different scale base valueunits. As a result, the scale base value cannot be determined in thesettlement.

System Response
Unable to save agreement.

Procedure
The scale base values within a single scale group must be identical.Therefore, you can do either of the following:
a) Adjust the scale base value of the relevant condition
b) Remove the condition from the scale group