If this error message is displayed in the log during synchronization with Mailchimp, the contacts are moved to the Connection Error subgroup and are not synchronized with Mailchimp. In this case, it is possible that a connection to Mailchimp has been duplicated and is linked to 2 contacts. In this case, please create a ticket with our support team via the following link:
Please attach a Daylite Support Access Token directly to the ticket, so that we can fix the error directly in your database.