I am getting this error message on a site using the DuracellTom Google tag Manager and WooCommerce.
Screenshot: http://note.io/NeaN74 (Despite this error message, the plugin is indeed up to date).
The site is also using the WordPress SEO WooCommerce extension.
Please let me know what you recommend.
>>Possible duplacate tag issue: you should disable Google Analytics tracking in WooCommerce settings by leaving Google Analytics ID field empty to prevent any duplicate tags being used on the frontend!