Is it possible to somehow avoid chaos in tests after the introduction of new functionality?

Question

Software testing

For example, we introduced an additional field into the User entity that gives N functionalities, in total 5,000+ tests, since everything revolves around the user and his features, capabilities, etc., let's say 60% of the tests fell.
What to do? How to be? Is it possible to edit everything manually?

Answer 1

Yes
Everything is done by hand
Even the code needs to be written by hand