Add song in previously used key rather than CCLI default key?

Is it possible (when selecting a song to add into the service), for the song to be recalled in the previous key used by the team rather than the song default key as initially downloaded from CCLI?

There isn't an option to pull "previous key," but you can edit the song in Planning to set a preferred default key. Then, anytime you add the song to a setlist, it will pull in the default key rather than the original key.