Monster does not exist

Monster does not exist after sacrifice or synthesis but still shows up as available for breeding/ synthesis etc. until you try to use it than you get the error msg.

This is really confusing when planning /sacarfice as I think I have more mobs than I actually do.

Are u using more than one Device to play HM??

iPhone and ipad

[support7]

After you scrifice your monsters, you may exit and relogin the game to update the data. Then it will show you exactly what monsters you have.