Hi again, i just managed to remove a duplicate copy of the Dolphin's installation with just a few issues that i have been able to fix.
The problem i am facing now, is that by removing the duplicate Dolphin's installation, some of the pictures disappeared from the site.
I did find them and i have tried to reinstall them by myself without telling every single user to upload them again, however, there is no way the administration's menu is allowing me to do that.
I have tried also the "Migration" option from a previous version of Dolphin (even if the version was the same, i only wanted to restore some lost data), but it get stuck and after 45 minutes i just gave it up.
This is the Avatar's field of a user whose picture got erased (i found it already but i can't put it back), as you can see, there is no available choice on display to upload it again