Amazon.com passkey

Hi there. Almost every time that I sign in to Amazon.com using my stored credentials, I'm prompted by 1Password to update or store a passkey. Why is this happening? As far as I know, a passkey doesn't constantly need to be regenerated or updated. This has been happening for several months and doesn't appear to be unique to my current OS (MacOS 26.0.1), browser (Brave 1.83.118), or 1Password v8.11.14.