Toilet flange hairline crack

[Ebird]

I am working on the master bathroom and when I removed the toilet I noticed bolt area snapped off and there are two hairline cracks that go a .25" on the inner radius marked with red. It's glued onto the outside of the pipe. I was curious the best route. I have a metal replacement closet flange I was thinking of putting over top and was curious if the new wax ring would over lap the hairline crack and be water tight and the metal replacement flange over top would be enough support to prevent further cracking. Or just to replace the whole thing and if so what's the best method? Thank you in advance for the guidance.View attachment ImageUploadedByPlumbing Forum1476232325.152957.jpg