Empty Contents files for bookworm-updates

[Markus Falb <markus.falb@mafalb.at>]

Hi, it’s Markus,

…snip
Index of /debian/dists/bookworm-updates/main

[ICO]   Name    Last modified   Size
[PARENTDIR] Parent Directory        -
[DIR]   Contents-all.diff/      2023-07-14 20:38    -
[   ]   Contents-all.gz         2021-08-14 10:49    20
[DIR]   Contents-amd64.diff/    2023-07-14 20:38    -
[   ]   Contents-amd64.gz       2021-08-14 10:49    20
[DIR]   Contents-arm64.diff/    2023-07-14 20:38    -
[   ]   Contents-arm64.gz       2021-08-14 10:49    20
...
snap...


The size of the gz files is 20, i.e. the unzipped files are empty.
Is this by purpose?

Best Regards, Markus