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Hi Alix It will solve your problems as long as you make sure all Meta is completed and that content is separated and those pages noindexed and removed as I said. This is what is causing your duplication. Glad to help Regards Nigel

Hi! The Moz tool is not being more specific as to what element is a duplicate? (ie: description, title, H1, etc)? I ran it through Screaming Frog and it only found a few H1s that are a duplicate, which is not even a big issue really.