Incorrectly redirect works in .htaccess

Question

It is necessary to redirect to the main page from the addressees 1) https://mysite/?Itemid=389 2) https://mysite/2-uncategorised.html?Start=6 .

Here is an example of my .htaccess:

According to the first rule, 404 is triggered. According to the second rule, nothing happens. Tell me what the problem may be.

Options +FollowSymLinks
RewriteEngine On
RewriteCond %{QUERY} ^Itemid=(. *)$ [NC]
RewriteRule ^$ /? [R=301,L]
RewriteCond %{QUERY} ^start=(. *)$ [NC]
RewriteRule ^ /2-uncategorised.html$ /? [R=301,L]