[itsme]

There are some cases where more than one key is essential: e.g. "Dream A Little Dream Of Me" exists in two famous versions: Ella Fitzgerald + Louis Armstrong play it in C with the B section modulating to Ab,  https://www.youtube.com/watch?v=jC4cXzvXSq4
This version can be found in various fakebooks.
The Mamas & the Papas on the other hand play it also in C but the B section is in A !!! https://www.youtube.com/watch?v=MWZfKcYlefE.
No dout that it's important which version to be picked for a setlist or a collection.

There are two workarounds to solve that:
1.) as for every other group you can add required key combinations to the list of keys by clicking the "+" button in the song editor window, see screenshots
2.) you can add the key to the end of the title field instead of using the "Keys" field of the library