Diagnosis
The settlement variant to be checked is to be valid as of &v4&.However, some participating settlement units are assigned on &v1&. Thisdate is not the period start date of the valid settlement variant &v2&which is valid at that time. One example of a valid period start dateis &v3&.

Procedure
Either assign the settlement variant to a different date, choose adifferent settlement variant or delete the participating settlementsassigned on &v1&.