Error Fetchmail with RT3


two days I have a concern. In fact I use Fetchmail order to create
tickets via email but since two days when sending an email, the ticket
is no longer on RT I created the following message in the log fetchmail:

fetchmail: 1 message (1 déjà vu) pour myuser dans
fetchmail: message ignoré non éliminé

here is the content of my fetchmailrc:

poll with protocol imap
username ‘myuser’ there with password ‘mypass’
no keep
mda “/opt/rt3/bin/rt-mailgate --url --queue
General --action correspond”

Do you have an idea where the problem can come?
Thank you