Persistent IMAP error - how to stop it

Recently imported data from an Outlook .pst file.  Somewhere along the line I tried to import contacts and got the below error.  I eventually got my contacts, but this error comes up constantly now and I don’t know how to stop it.

myemail@server: An error occurred
[IMAP} Unable to create folder “myemail@server/Contacts/Contacts/” on the server. (Create failed)