hard shutdown

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Hi,
The rhel 8.8 rebooted and in /var/log/messages
Apr 9 06:22:01 bbemnbgp101d systemd: Started Session 2877135 of user nagios.
Apr 9 06:23:01 bbemnbgp101d systemd: Started Session 2877136 of user nagios.
Apr 9 06:24:01 bbemnbgp101d systemd: Started Session 2877137 of user nagios.
Apr 9 06:24:33 bbemnbgp101d SAPFP1_04[17164]: Q41 Monitoring: Snapshot 1 created; reason: Hard Shutdown
...
Apr 9 07:07:48 bbemnbgp101d systemd: Stopping LSB: start the PERMEV...
Apr 9 08:21:15 bbemnbgp101d kernel: Command line: BOOT_IMAGE=(hd0,msdos1)/vmlinuz-4.18.0-477.10.1.el8_8.x86_64 root=UUID=fc30d761-009b-4a8a-a480-a7309c04035c ro elevator=noop barrier=off c
rashkernel=auto rd.lvm.lv=vg00/lv_swap rhgb quiet

uname -a
Linux bbemnbgp101d 4.18.0-477.51.1.el8_8.x86_64 #1 SMP Fri Mar 1 11:21:44 EST 2024 x86_64 x86_64 x86_64 GNU/Linux

As you can see at Apt 9 06:24:33 ->Hard Shutdown.
What is this and what is the reason?
Then the OS stopped at 07:07 and booted at 08.21 ->45 minutes was stopped.Does it means somebody booted the server?

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