First of all sorry if this was already asked (probably) but I had no idea what to search and I didn't found anything.
So I got this model and I for some reason that I dont know, welded 2 islands (that are not connected) in one single island. So they're overlaping but they're welded. Is there a way to simply break the islands without the need to redo the uvs?

Replies
Simple and I haven't thinked about this before.. I just need to avoid welding the vertex again.