Detected duplicate content with canonical applied

[Eurasmus.com]

Dear all,

We are getting duplicate content from items which have a canonical applied. 
This error is coming in every report and we have no way to mark an error as revviwed what it takes double time for us to check it again. Is there any solution for this, are we doing something wrong???

[Keszi]

Hi Jose,

The canonical "Warning" is a notification. Tools cannot tell which is the original page, but can alert you that you have a canonical link on the specific URL.

With this report and a little Excel work you can double-check your canonical implementation.

Greetings, Keszi

[JordanRailsback]

Hi there!
It's definitely possible for a page to be correctly flagged as duplicate content while a canonical tag is applied. This typically happens in cases where the pages are being seen as duplicates of each other, but are canonicalized to different pages.

If you'd like to see a more specific example of where this is occurring on your site, I'd be happy to talk through it with you through a private message to help@moz.com :). I hope this helps to explain!