TT question about HDHP plan coverage

I got to the TT (desktop version) page where it is asking what type of HDHP plan (family, self only or none) I had as of 12/01/2022. I am on Medicare (and have been since April 2020) and have had additional coverage thru Aetna the last 2 - 3 years, however, if I answer this question as "self only" then the next screen is indicating I had a lapse in coverage in 2023 which I did not? Very confusing. Since I'm on Medicare with the additional Aetna coverage should I be answering this question as "self only" or "none"? Thank you!