If a passkey prompt shows an old name, the saved credential may still be labelled with an earlier profile name. That does not, by itself, mean the account was deleted or that the passkey has stopped working.
What the old name can mean
Hypothetical library example: Reader A changes their library profile name to Reader B. The same passkey remains saved on the device, but the account chooser still displays Reader A. Here, the visible label and the current server-side profile may not have updated together.
A saved label is not a complete account history. In this example, Reader A could still describe the renamed profile; the prompt alone cannot settle the account identity.
How to check without creating confusion
First, compare the prompt with your own known library profile: check the account name, familiar sign-in context and the credential manager entry on your device. Do not delete the passkey merely because its label is old. Deleting it could remove a useful sign-in option.
Also avoid registering another passkey just to obtain a newer label. That can create duplicate credentials or make it harder to tell which entry belongs to the same account. If the known profile is correct but the prompt is outdated, consult that service's help about saved account labels. Do not assume a user-facing synchronisation button exists.
What synchronisation can and cannot guarantee
Supported WebAuthn signalling methods let services update authenticator-held names. This does not guarantee automatic updates everywhere. See MDN’s Web Authentication API reference for this technical background. The reader's useful evidence is the known rename, not an assumption about automatic synchronisation.
If the old name remains while the known profile still works, treat it as a display mismatch first. Contact the library through its recognised support route only if the account identity is unclear, the passkey fails, or the service shows an unexpected separate account. Do not publish screenshots containing account identifiers.
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