Display the following "Error(s) encountered during statement execution: column index out of range"
Error(s) encountered during statement execution: column index out of range [QUERY: SELECT DISTINCT itemID
FROM itemDataValues
JOIN itemData USING (valueID)
JOIN items USING (itemID)
LEFT JOIN deletedItems USING (itemID)
WHERE deletedItems.itemID IS NULL
FROM itemDataValues
JOIN itemData USING (valueID)
JOIN items USING (itemID)
LEFT JOIN deletedItems USING (itemID)
WHERE deletedItems.itemID IS NULL
https://www.zotero.org/support/reporting_problems#provide_steps_to_reproduce
But if you're getting this error when you sync, you should restart in Troubleshooting Mode (Help → "Restart in Troubleshooting Mode…”), which temporarily disables all plugins, and see if it still occurs. If it does, provide a Debug ID (different from a Report ID) for a sync the triggers it.