original url - example.com/stars.php?id=9&s=lorem-ipsum
want to be - example.com/stars/9/lorem-ipsum
here is my try - getting error 500
RewriteCond %{THE_REQUEST} \s/stars\.php\?id=([^&]*)&s=([^\s&]*) [NC]
RewriteRule ^ /%1/%2? [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^([^/]*)/([^/]*)\.php$ /stars.php?id=$1&s=$2 [L]
.htaccess and stars.php are placed in the root - example.com
pls help