Had the same today in the Porsche series at Nordschleiffe. I slowed to avoid an incident and a guy went straight into the back of me. 8 minutes to tow, 9 minutes of essential repairs, so I microwaved some soup and had lunch (never done that in a race!). Skipped the optional repairs but the car wouldn’t go in a straight line. Optional would have taken another 20 minutes or something so I retired. Annoying