I have 1 Gmail account. I have many emails in 'All Mail' and some of those are in 'Inbox' (as this is how Gmail works). I want to remove duplicates across all folders; I just want 1 version of each email. It doesn't matter which duplicate gets deleted: the remaining email can be in All Mail or in Inbox: it doesn't matter to me.

I configured my Gmail as follows:

• Auto-expunge: Off
• When a message is marked as deleted and expunged from the last visible IMAP folder: Move the message to the Trash
• Folder size limits: Do not limit

I used the following command in v2.290 on Windows (with an App Password generated from my Google account):

.\imapsync.exe ^
   --host1 imap.gmail.com --user1 MYEMAIL@gmail.com --password1 "abcd efgh ijkl mnop" --ssl1 ^
   --host2 imap.gmail.com --user2 MYEMAIL@gmail.com --password2 "abcd efgh ijkl mnop" --ssl2 ^
   --nofoldersizes ^
   --skipsize ^
   --delete2duplicates ^
   --debuglabels

Imapsync's log says it finds 1005 duplicates in 'All Mail' and 0 in all other folders, and it says it removes all 1005 duplicates. But when I look at my Gmail, nothing has happened: I have the same number of emails in All Mail and nothing in Trash. When I re-run Imapsync with the same command I get the same result. I also tried with Auto-expunge On but I get the same result.

What am I doing wrong?
Thanks!