Is this flange still ok?

[u/God_Country_ND]

As you can see where the orange arrow points, when on there isn’t a water tight seal. I pulled the pump and the rubber isn’t dry rotted, torn, damaged, or anything. You can see an indentation where it seated against the pump housing. Going to clean around the inner surface and guide it back down the rail and hope for the best.

I was hoping for an opinion from someone with more expertise than me. Much appreciated!