use more liberal pin (`100`) which allows upgrading packages while respecting default release policies. also use the `archive` name instead of none-existent suite name
<pre class="rahmen">
Package: *
<pre class="rahmen">
Package: *
-Pin: release suite=grml-stable
-Pin-Priority: 1
+Pin: release a=grml-stable
+Pin-Priority: 100
-Pin: release suite=grml-testing
-Pin-Priority: 1</pre>
+Pin: release a=grml-testing
+Pin-Priority: 100</pre>
<p>Also note that you may have trouble installing the <code>grml-debian-keyring</code> package as APT will complain about the missing key. A workaround is to download it directly:</p>
<p>Also note that you may have trouble installing the <code>grml-debian-keyring</code> package as APT will complain about the missing key. A workaround is to download it directly:</p>