That depends on the author
omegaverse is based on the writer. it doesnt have anything that is established so authors can modify it according to what they like but i read some mangas where they talk about mate cancelling or smth along those lines and apparently the omega just needs to be bitten by another alpha
It's permanent...but in some mangas the mark can be broken by the alfa..but I don't know what happens to the omega
agreed with the first comment^^ but i've never read about an alphaxomega not working out despite having a bond. their pheromones would most likely clash with each other and they'd have no choice but to always be together
If an omega is marked by an alpha and it doesn't work out between them, can the mark be marked again by another alpha or is it just permanent?