Upload session expired
Part or complete was called after the pending multipart session’s expiresAt passed (410). Typical TTL is about 24 hours from init.
Why this happens
The tab sat open too long, the transfer was very slow, or the client reused an old fileId after expiry. There is no admin toggle for this TTL today — it is set at init in code.
Diagnose and fix
1. Member: cancel/discard the stuck item and start a fresh upload.
2. For very large files, keep the session active and finish within the day, or use SFTP / a faster path.
3. Distinct from Upload not found (no session row) and auth “sign in again” messages.
4. Admins: no Users & limits knob — educate users or change the code TTL if the product needs a longer window.