"only XL"

The question is: why did the tournament judges and the AK initially state that in my game with Indra, I would get a technical win, and the results of the other games would remain valid, but now there's a disqualification and a complete reset of the results?

Yes, something similar happened in the novice league – I had a game on an almost completed save with a player who was disqualified, and I earned exactly 0 points from him, which either affected or could have affected my failure to advance from the group.

P.S.
Get used to it ;(