Duplicate messages after maildir imports with stalwart-cli

[pacien]

I'm in the process of migrating a maildir to Stalwart.
For this, I used stalwart-cli import messages -f maildir.

I ran the command a fist time, then interrupted it to continue later,
importing about 1'000 messages.

I then ran it again to fully import the maildir of 88'000 messages,
and the command successfully terminated importing them all.

I then ran the command again to import new messages received in the meantime.
I interrupted this run after 16'000 messages when I noticed something wrong.

Stalwart's internal maildir directory contains about 105'000 items,
which corresponds to the sum of the three runs.

However, as I understood the documentation, identical messages are not supposed
to be imported again.

From https://stalw.art/docs/management/import/maildir/#usage:

If the import process is interrupted, the CLI tool supports automatically
resuming the task without duplicating messages or folders.

Am I using the import command incorrectly here?

Using stalwart-cli 0.3.6.

[mdecimus]

Hi,

When accessing the mailbox, do you see your messages duplicated? Or are they just duplicated in the Maildir folder?
It could be also that the extra files you are seeing are aborted uploads which will be deleted after the blob TTL expires and the purge task is run.