[CMS] Problem with 301 redirect for CMS page

[Mermaid]

I am removing one of my CMS pages and want a 301 redirect for that page, as the content is now on a static html page on a different site.. However this doesn't seem to work

In my .htaccess file I have:

Redirect 301 /content.php?121-Oldpage http://www.mydomain.com/newpage.html

Can anyone tell me why this is not redirecting please?

[Mermaid]

Obviously it is the question mark messing up the redirect, so I tried this:

RewriteCond %{QUERY_STRING} ^121-Oldpage$
RewriteRule ^content\.php$ [url]http://www.mydomain.com/newpage.html?[/url] [R=301,L]

Still no luck

[Mermaid]

problem solved, I just need to move that rule higher up in the order.