Class switch - Who´s Saia?

I switched from Live to Chaos and get the message, that Saia get back to stables and that I can´t use them until I become an Death Mage again.

I didn´t have an “Saia”-Creature and I´m never was an Death Mage. I´m confused.

Version: 0.5.6.
Realm I have switched: 34