My Angelfish spawned with Altum

[AlexS]

I just noticed that one of my Angelfish has spawned with one of my altum angelfish. This was totally unexpected for me. I have heard that interbreeding these two varieties is bad. Could anyone tell me what kind of issues I could face because of this?

I'm not sure which is male or female but I think that the casual Angel is the Male and the Altum the Female

Any help is appreciated