RSS VALIDATION ERROR

[DAMIANOS]

Need help with my feed validation error
​https://dimokratiki.gr/feed/
I am getting this for no obvious reason:

Sorry

This feed does not validate.

    line 8, column 44: XML parsing error: <unknown>:8:44: not well-formed (invalid token) [help]

        	xmlns:media="http://search.yahoo.com/mrss/"xmlns:media="http://search.yahoo ...
                                                    ^

Source: https://dimokratiki.gr/feed/

    <?xml version="1.0" encoding="UTF-8"?><rss version="2.0"
    xmlns:content="http://purl.org/rss/1.0/modules/content/"
    xmlns:wfw="http://wellformedweb.org/CommentAPI/"
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:atom="http://www.w3.org/2005/Atom"
    xmlns:sy="http://purl.org/rss/1.0/modules/syndication/"
    xmlns:slash="http://purl.org/rss/1.0/modules/slash/"
    xmlns:media="http://search.yahoo.com/mrss/"xmlns:media="http://search.yahoo.com/mrss/"
     
    xmlns:georss="http://www.georss.org/georss"
    xmlns:geo="http://www.w3.org/2003/01/geo/wgs84_pos#"....

Please advice - help