<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/125684>125684</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Packaging issue with apt.llvm.org on Ubuntu 20 (focal)
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          pelmers-db
      </td>
    </tr>
</table>

<pre>
    Since yesterday, a fresh `apt update` with apt-list http://apt.llvm.org causes a dependency clash.

## Repro steps
1. sudo apt update
2. sudo apt install clang-format llvm lldb

## Observed
```
The following packages have unmet dependencies:
 clang-format : Depends: clang-format-20 (>= 20~) but it is not installable
 lldb : Depends: lldb-20 (>= 20~) but it is not installable
 llvm : Depends: llvm-runtime (= 1:20.0-60~exp1+0~20240729114906.19~1.gbpfa7bb9) but it is not going to be installed
        Depends: llvm-20 (>= 20~) but it is not installable
E: Unable to correct problems, you have held broken packages.
```

## Expected
latest version of clang-format, llvm, lldb are installed
</pre>
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