Wild accident with leasing vehicle – calculation of impairment

Hello all, I have a short question, but am not sure if this is the right sub-forum. I had an unindebted wild accident in January with my leased mini. The damage i.H.v. 2,800 EUR has been remedied via the TK. Now I have received mail from the leasing agent Sixt, which charges a depreciation of 10% of the damage amount. After questioning this refers to the AGB’s, where in case of “self-indebted” damages the customer Sixt a mercantile who http://auto.sixt.de/fileadmin/sys/pdf/AGB_Sixt_Leasing.pdf § 111.8 Sentence 2 From my point of view, this is only a wild accident, which I did not owe myself, because the deer ran in front of my car, not the other way around. How does that happen for you, do I have to pay? Thank you in advance.