Looks like a parameter being used by some site. Might just be citing your site as the source of information, or could be used in a backlink to your site. It's not necessarily a negative thing. You need to investigate.
To block it, find out where it's coming from and block by domain, or by UA or by IP: Blocking Methods [webmasterworld.com]
If you don't personally use the “newsid” parameter at all, then you’ve got two options in GSC.
#1 tell G### not to crawl URLs containing this parameter . (Analogy: URLs containing an element like “printfriendly=yes” where the parameter is only present if it’s got a Yes value.) #2 tell G### to disregard the value of the parameter. (Analogy: “sortorder” or “sortby”. It will always have some value, but to the search engine it doesn’t matter which one.)
Choose carefully, because only you know what your URLs are supposed to look like.