When you try to upgrade a file, the Add-On Data Conflict message displays.
Schema conflicts experienced when upgrading may be occurring in two possible scenarios:
Scenario 1
Issue
The file you're upgrading contains a schema. Another model opened in your current session contains a schema with an identical ID to the schema used in the file you are upgrading. When both files are opened in the same Revit session, only one schema will be maintained, leading to the removal of the other.
Solution
- Close Revit.
- Re-launch Revit.
- Attempt to upgrade the model again before opening any other models in the session.
These steps will resolve the issue if you have encountered the error in the first scenario. If you continue to experience the errors continue troubleshooting with scenario 2.
Scenario 2
Issue
The file you're upgrading contains a schema, and one or more loaded families in this file also contain a schema with the same ID. When such a file is upgraded in Revit 2025 or later, only one of the conflicting schemas will be maintained, the other will be removed.
Solution
Contact the add-on vendor for additional information about the consequences of removing this schema.