Cannot change attachment linkMode during sync, even in Troubleshooting Mode

D.yamasaki
Report ID: 255059415
Previous Report ID: 156712138
Debug ID: D1347626662

I am getting a sync error in My Library:

ZoteroObjectUploadError: Cannot change attachment linkMode

The error appears during syncing and stops upload with:

Made no progress during upload -- stopping

This still happens in Troubleshooting Mode / safeMode. The error report shows that all extensions were disabled.

Current affected item keys include:

M7D559N5
8SZWDEB6
LXPSUTXE
43R2WIAX
I2XAAP35
TGRG3HA5
MBLIMVRX
B6HLQHLS
VQKFUXIE
K693TXKT

Previously, I removed another set of affected attachment PDFs from the Zotero trash, but syncing then stopped again with a new set of item keys.

I am using Zotero 9.0.4 on macOS 26.5.1.

Installed plugins, currently disabled in Troubleshooting Mode, include:
Scite Zotero Plugin, Notero, Inciteful Zotero Plugin, ZotMoov, Translate for Zotero, Better Notes for Zotero, Better BibTeX.

Because the affected item keys keep changing after deleting attachments, I have stopped deleting more attachments and would appreciate advice on how to repair the affected attachment items safely.
  • dstillman Zotero Team
    This would've been caused by some plugin you used, so I'm afraid we're not able to help. Something changed existing attachments from stored files to linked files, which isn't a valid operation. (The plugins that do properly create new attachments.)

    Best I can suggest would be to delete your local database and pull it down again from the online library via sync.
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