If the catalog is fully synced or if you have not placed any assets in Lightroom yet, you can rename the local MCAT file so that the catalog information is synced and your local catalog is restored.
Syncing the catalog from cloud to your local desktop may take some time. The icon at the upper-right corner will update you on the progress. A new Managed Catalog.mcat file is created once the syncing is complete.
Retain the old MCAT file until you have verified that the catalog has been recovered completely. Once sure, you can delete Managed Catalog.old file.
All original images were imported from Lightroom for mobile, Lightroom on the web, or were synced from Lightroom Classic as Smart Previews.
In this scenario, follow the steps above to restore your Lightroom catalog.
Some or all original images were imported via Lightroom desktop application.
In this scenario, follow the steps below:
If there are more than one catalog id strings present on your system, follow the steps below to identify the correct catalog id string for your catalog: