Migration of company code and plant directly on database

Hello all,

In my company we have 4 business divisions each with its own company code and plant. We have a task to put all 4 under the same company code and plant, separating them by business area.

I want to discuss what issues(if any) can occur if I change the company code and plant of all projects and its objects, including project definition, WBS element, network header and network activity. Can someone contribute?

The other option is to close all projects and recreate on the new plants which will cost us a lot of money since we have a lot of them, on many systems, with many interfaces and I want to avoid it.

Some info regarding other objects:

All PRs and POs will be recreated. Work centers will also be recreated on the new plant. The cost centers which are settled to will be migrated on database level. Assets will be recreated.