Has this happened to you already ?
Bad luck for you.
You were in the "border" of two levels.
It happened to me, once playing vs teams 1 lv above and once playing vs 1 lv bellow
I made a suggestion about this.
If there are not enough teams to fill the groups, teams with 5th-6th positions should play and not from the lower level.
It's a trolling, a lost season (if not have 7* team ).
Maybe time for tanking