Invalid attachment hash 'undefined'

Debug ID: D199242638

I met following errors when trying to sync files from webdav:
"An error occurred during syncing: invalid attachment hash 'undefined' appears.




  • (3)(+0000000): Finished download of D:\[…]\zotero\tmp\HWYNUHX6.tmp

    (2)(+0000000): HWYNUHX6.tmp is not a valid ZIP file
    (3)(+0000653): HTTP GET http://[…]@[…]/remote.php/dav/files/[…]/zotero/54WAHH2J.prop succeeded with 200

    (3)(+0000000): <properties version="1"><mtime>1681976909576</mtime><hash>undefined</hash></properties>
    There are at least two invalid files on your WebDAV server — HWYNUHX6.zip and 54WAHH2J.prop.

    It looks like you've synced with a third-party Android app. If you paste "HWYNUHX6" and "54WAHH2J" into the Zotero search bar in All Fields & Tags mode and look at which attachments those are, do you recall where you last made changes to those files?

    For now, your best bet is to delete the .prop and .zip files for those files on the WebDAV server to allow syncing to go through.
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