Issue in system updates

[Inma]

Server operating system version

Debian

Plesk version and microupdate number

18.0.57

in system updates I get this

Error: No se pudo obtener la lista de paquetes: 2024-01-12 07:40:58 INFO: pum is called with arguments: ['--list', '--repo-info', '--json', '--unsafe']2024-01-12 07:40:59 ERROR: Apt cache fetch failed: E:The repository 'Index of /debian-security bullseye/updates Release' does not have a Release file.2024-01-12 07:40:59 ERROR: E:The repository 'Index of /debian-security bullseye/updates Release' does not have a Release file.2024-01-12 07:40:59 ERROR: Exited with returncode 1.