Compulsory reduction of damage in the event of rockfall

Hello, I have reported a rockfall in my windshield and this one to the insurance company in March. However, I would like to repair/exchange the disk only with the next maintenance (about 9000km until then). Today I received a letter again and called on it. On the phone I mean the wife, I can not have the disk replaced in general, but must have it repaired if this is possible. I am obliged to do this as part of the damage reduction programme. I should also take a photo of the rockfall now, so that I can be held responsible for this in case of a deterioration of the disk. Now the real question: Is that true, that I have to have the disk repaired?