In my case, there are 95 packages that depend on zlib, so removing it is absolutely the last thing you want to do. Fortunately though, GPT also suggested refreshing the gpg keys, which did solve the update problem I was having.
You gotta be careful with that psycho!
It’s even funnier when you start arguing with it about things like this. Some times GPT just refuses to acknowledge its mistakes and sticks to its guns even harder.