Problem with joining vertices

[Anonymous]

Hey guys There is this problem that occured while UNW wrapping a model of M24 stick grenade. There is this green vertex that is not in place and there is a another vertex thats missing that should be under it how do I fix it? Would appreciate if someone could Help thanks

[Anonymous]

Select the missing face in the viewport if you can't find it in the UV editor. Detach it if you need to and weld it in place where you want it.

[Anonymous]

Yep it worked I just remembered I had a hidden edge -.-' but thanks for your help and could you help me with this problem where i get a blue edge line and as you can see on the picture it deforms UV map, Im not sure what that means and how to fix it thanks