You are about to upgrade from a previous version to DAM for Sitecore (DFS). Which requires your attention.
Updating the module to DFS 10.4.0
Install the new
DAM for Sitecore-10.4.0-U.zip
package and overwrite all when asked.
It is important that you install the package tagged with a U. This means that it is a upgrade package. If you install the package without a U, then all synchronized assets will be deleted and you have to do a full synchronization. If you have a lot of assets in your DAM, then this task can take a long time.
After updating
It is important that you do a full synchronization of the configuration. We have made some breaking changes around this area.
Now you should be fully done with the update.