DocumentionUmo Editor NextVersion HistoryTroubleshooting

Troubleshooting

1. Version entry is missing / panel is blank

Checklist:

  • collaboration.enabled must be true
  • versions.enabled must not be false
  • Collaboration connection must be healthy (WebSocket reachable, token valid)

See also:

2. Saving a version says “No changes, cannot create a new version”

This avoids storing “no-op snapshots”.

Default behavior: if the current content is identical to the latest saved version, creating a new version is rejected.

Suggestions:

  • Make a small change and save again
  • Or allow “milestone-only versions” in your product (record milestones without requiring content changes)

3. Version preview fails / shows “Version content not found”

Possible reasons:

  • The version did not finish saving (the record exists, but the preview payload was not persisted or is unreadable)
  • Server storage was cleaned or migrated incompletely, causing old previews to be missing
  • Document identifiers mismatch, so the server can’t find the preview data for that version

How to narrow down:

  • Confirm the version exists in the version list (you can see version number and name)
  • In the Network/WebSocket panel, check whether action: 'version.preview' receives a corresponding event: 'version.preview' response

4. “Important” label does not show / toggle does not work

Checklist:

  • Confirm you used “Mark as Important / Unmark as Important” in the version item’s “More” menu
  • Confirm collaboration is connected (actions won’t sync while offline)
  • If you render your own list: ensure your version list data includes the important field