I just checked back through the previous seasons of the league that you competed in until 5th July before you took a six month break from the game.
In Season 59 you finished 16th (last in a 2 car league) in the Elite tier and as a result you would have been relegated to Pro. So when you joined your current league today you joined in the tier you were in when you last raced on 5th July.
IGP4 Italian Championship - Season 59 Final Standings - Elite Tier