Diagnosis
The contract has conditions that have a validity period begining on orafter &v3&.

System Response
When you save the contract, the system changes the customer of the newmaster tenant &v2& only in those conditions that have a validity periodbeginning before &v3&.

Procedure
For future conditions to also be updated correctly, you have to processthe "Conditions of active contracts" after you save. In the case of an(identical) change, the system replaces the customer of the originalmain tenant with the customer of the new main tenant &v1& in allconditions when you save, regardless of their validity period.