We're using this approach on a large team and db but are struggling with having multiple major version branches in play at the same time and backporting of func

We're using this approach on a large team and db but are struggling with having multiple major version branches in play at the same time and backporting of functionality and bugfixes breaking things by changing the order in which changes get applied. At some point, the problem remains that you're migrating the data in a live system, and that means the order of changes matters.