Yes, it sounds like your Form 8606 was incorrect for 2009. As @dmertz stated, you can amend recent returns and send corrected 8606's for years too old to amend, just for years it was needed. Most important is to get correct basis into your 2024 return
Here's more info on Form 8606 and How to Trigger Form 8606.
@KarenSue1
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