Bad news from the Search Engines!

Hi.
I got bad news from the search engines.  The pages http://Yourstore.YY/ and http://Yourstore.YY/homepagetext have the same (DUPLICATE) content. And as a result, the pages are removed(DELETE) from indexing. Could someone tell ... am I missing something?  ... and what to do? Any thoughts... really need help.
P.S....upgrading from nopCommerce 3.70 to 3.90.
Best Regards.

Thanks a lot! We'll investigate it - https://github.com/nopSolutions/nopCommerce/issues/2396