title: Redirect URL with no filename
body: <p>i need to redirct the following url:</p>
  
  <p><a href="https://www.domain.de/?topic=bla&amp;ID=11111&amp;serie=2222" rel="nofollow noreferrer">https://www.domain.de/?topic=bla&amp;ID=11111&amp;serie=2222</a></p>
  
  <p>to </p>
  
  <p><a href="https://www.domain.de" rel="nofollow noreferrer">https://www.domain.de</a></p>
  
  <p>I tried this, but it doesn't work:</p>
  
  <pre><code>RewriteRule ^?topic=(.*)$ https://www.domain.de [R=301,L]
  </code></pre>