Tired crack error when pulling up or curb?

Hello, since I got a new car, the car dealer looked at my current one because of a possible payment. I bought in January 2021 brand new 245er and had it raised, now the examiner from the car dealer found that the rear left is a crack at the edge (did not notice, probably also become a bit bigger over time) , he asked me immediately if the new idea came up and when I affirmed that he was talking about an M days damage by the company which has raised the new tires. Since I was now this morning the same and what I already knew before says the does not originate from assembly errors but curb damage, he then also tried to explain to me that a damage by assembly would have been then a querriss, no matter what he means. Before I drive now to an expert, I ask here, if someone already has something in the direction? In the appendix is a photo.