Your model has been restored to an earlier version.
Warning: Your model has been restored to an earlier version. As a result, you cannot perform worksharing operations, and all the changes after the last synchronize with central will be lost.
Issue: See View and Restore an Earlier Version of a Cloud Model.
Solution: Close the model and re-open it. The restored model will open for you. It is recommended that you use the Save As tool to preserve your changes before you close the model. You can copy your changes to the cloud version.