You have 2 choices,
1. Accept the Q1 AP and get the car around week 21
2. Cancel the order and then re-order at the reduced Q2 AP
Realistically there may be little difference in the actual delivery date as Skoda have paused production of the 60 models to increase production of the 85 models and lessen delays.
Please excuse spelling/typos. Apart from being a clot it turns out I had one on my cerebellum that's now causing various problems!