Not able to migrate to v7.2 from v6

I did a lot and have the feeling to be almost there but I need help to understand this error message and have a solution to it:
Executing frappe.patches.v6_2.rename_backup_manager in site2.local (a46003081c220c38)
/home/frappe/frappe-bench/apps/frappe/frappe/integrations/doctype/dropbox_backup/dropbox_backup.json missing

ImportError: Module import failed for Dropbox Backup (frappe.core.doctype.dropbox_backup.dropbox_backup)

I see dropbox_settings and dropbox_settings.json. I installed again dropbox_backup but the patch seems not to rename it…I would appreciate.

It was a long time ago that I ran into the same issue. I think from memory that I had to uninstall dropbox backup then migrate/bench restart etc…then try the update again as dropbox was merged into V7.

Thank you for your message! After uninstall dropbox-backup I get the same error after migrate or update again:
Any ideas, please.