It seems like I was unable to replicate this issue, can you update your Joomla backend and FTP access at https://stackideas.com/dashboard/site so we can better have a check?

I have updated post with credentials

But may be the problem is with redirects from www to no www.
There is no redirects at this moment and may be I need configure it

I tried to view the site at https://dachadacha.com/novosti/biznesmeny-budut-zakupat-dikorosy-u-rossiyan and it does not seem to contain any duplicates, https://take.ms/SRnOl

Am I missing anything here?

hmm... is is ok now. May be there is something strange with cache...
I don't know how to reproduce that ...
so let's close the ticket

Alright, keep us update if the issue still persists.

Just for your information, I have locked and marked this thread as resolved to avoid confusions in the future. Please start a new thread if you have any other issue in the future so it will be easier for us to manage your inquiries.

Thanks for understanding.