Odd Request to complete Self Assessment for the tax year before entering UK as tax resident

I entered UK with a valid visa in May 2022, and became a UK tax resident within the tax year of 2022/2023. I have submitted my Self Assessment tax return online last month. However in my personal-account/self-assessment-summary page, there is a green button stating "Complete Self Assessment return 2021 to 2022", apart from the "Complete Self Assessment return 2022 to 2023" that I have already done. Do I need to fill in the tax return for 2021/2022 as well, even if I am not yet a UK tax resident? There is a note next to the green button stating "Penalties may be charged for late returns. File your return now.", which is rather worrying. Your prompt reply will be very much appreciated.

Hi eymw,
Please refer to Self Assessment tax returns.
Thank you.