Form 8889 error

I have my own HSA and HDHP, but I am being claimed as a dependent on my parent's tax return as I still live at home. I got this plan in September with a new job, so I marked Sep-Dec as self-only on form 8889, and the previous months as none. I am not trying to claim a credit as I am ineligible, but when I do the final check, it says I am ineligible and to check a different option than self-only for which months I had it. I am not sure what to do about it.

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