Entities are not rolling up correctly after re organization in fccs

If we have re-organisation within a fiscal year - Entity A belongs to Parent A in one month but Parent B in the subsequent months, what is the best practice?

Example - Entity A belongs to Parent A until March 2024, but from April 2024, it should be now part of Parent B.

We are facing issues with a approach in which we have moved Entity A from Parent A to Parent B and consolidated the numbers, Entity A does have numbers loaded on it but it is not rolling up to Parent B correctly.

Kindly advice with a best practice.