Hi there, that is a 2020 board if it is Blue Orange and the serial nr is FA20 = 2020.
You can check 2021/2020 in our archive. Perhaps the Dealer got mixed up - shape of 2020/21/22 and 23 are however all the same, so not a big issue. Produced in September 2019 is for sure a 2020 model, as we produce mainly from April to Dec of the model year before - our Wave/Freestyle 2023 boards for example are produced in April-Dec of 2022, released onto the market in September 2022 and run until September 2023 until the 2024 model is launched. I guess you need to contact the Dealer?