How to solve our duplicate content issue? (Possible Session ID problem)

[DannyNutcase]

Hi there,

We've recently took on a new developer who has no experience in any technical SEO and we're currently redesigning our site www.mrnutcase.com. Our old developer was up to speed on his SEO and any technical issues we never really had to worry about.

I'm using Moz as a tool to go through crawl errors on an ad-hoc basis.

I've noticed just now that we're recording a huge amount of duplicate content errors ever since the redesign commenced (amongst other errors)!

For example, the following page is duplicated 100s of times:

https://www.mrnutcase.com/en-US/designer/?CaseID=1128599&CollageID=21&ProductValue=2293

https://www.mrnutcase.com/en-US/designer/?CaseID=1128735&CollageID=21&ProductValue=3387

https://www.mrnutcase.com/en-GB/designer/?CaseID=1128510&CollageID=21&ProductValue=3364

https://www.mrnutcase.com/en-GB/designer/?CaseID=1128511&CollageID=21&ProductValue=3363

etc etc.

Does anyone know how I should be dealing with this problem? And is this something that needs to be fixed urgently?

This problem has never happened before so i'm hoping it's an easy enough fix.

Look forward to your responses and greatly appreciate the help.

Many thanks,

Danny

[LoganRay]

Hi,

This is a pretty simple fix - all you need to do is add a canonical tag that points to the root version of the URL.

For example, on https://www.mrnutcase.com/en-GB/designer/?CaseID=1128510&CollageID=21&ProductValue=3364, add this canonical tag: