I wanted to check if there's upgrade compatibility between OZ Contracts 4.x and 5.x, or in which contracts the compatibility was preserved and which is wasn't.
I want to migrate some contracts that use ERC4626 and AccessControl from 4.x to 5.0 or 5.1. And I want to check if I will need to deploy brand new contracts or if, in principle, is safe to upgrade a 4.x contract with a 5.x one.
Thanks!