301 via htaccess redirect problem

I am trying to redirect from an old link to a new link via htaccess (because the sharemaps plugin somehow does not work the way it should if I want to change the *.xml file). Anyway...

Adding this to my htaccess:

Redirect 301 /sharemaps/view/6917/mapexample https://www.mysite.com/sharemaps/view/6922/mapexample

leads to this:

https://www.mysite.com/sharemaps/view/6922/mapexample?__elgg_uri=sharemaps/view/6917/mapexample

How comes I geth this "?_elgg_uri=" - which I do not want in this case