Package fails to install with error:

Des:1 http://security.debian.org/debian-security bullseye-security/updates/main
amd64 tzdata all 2025b-0+deb11u1 [307 kB]
Descargados 307 kB en 0s (1.090 kB/s)
Leyendo lista de cambios... Hecho.
Preconfigurando paquetes ...
(Leyendo la base de datos ... 83518 ficheros o directorios instalados
actualmente.)
Preparando para desempaquetar .../tzdata_2025b-0+deb11u1_all.deb ...
Desempaquetando tzdata (2025b-0+deb11u1) sobre (2025a-0+deb12u1) ...
dpkg: error al procesar el archivo
/var/cache/apt/archives/tzdata_2025b-0+deb11u1_all.deb (--unpack):
 no se puede abrir `/usr/share/zoneinfo/posix/Africa/Abidjan.dpkg-new': No
existe el fichero o el directorio
Se encontraron errores al procesar:
 /var/cache/apt/archives/tzdata_2025b-0+deb11u1_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

After that Cacti php8.2-fpm returns "Bad Gateway" and cacti site don't work.
This is de error from php log:

27-Apr-2025 21:36:46] WARNING: [pool wordpresspool1] child 1226 exited on
signal 11 (SIGSEGV) after 27.696808 seconds from start

Workaround:

To solve it I've installed mannually version tzdata_2025b-0+deb12u1_all.deb

Regards

control; notfound -1 2025b-2
control: found -1 2025b-0+deb11u1

Hi,

It appears that your system is still using the security archive from
bullseye on a bookworm system. This should be removed from the apt
configuration.

This happens because installing the bullseye version of tzdata over the
bookworm version is not supported.

This is indeed the right thing to do. That said this should have been
done automatically during the upgrade. I guess you system is missing the
stable-updates entry for stable/bookworm:

https://wiki.debian.org/StableUpdates

Regards
Aurelien