Unable to enable ntp service

KDE security edition.

   └──╼ $sudo systemctl enable ntp
Synchronizing state of ntp.service with SysV service script with /lib/systemd/systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install enable ntp
insserv: warning: current start runlevel(s) (empty) of script `ntp' overrides LSB defaults (2 3 4 5).
insserv: warning: current stop runlevel(s) (2 3 4 5) of script `ntp' overrides LSB defaults (empty).
insserv: Script ntp has overlapping Default-Start and Default-Stop runlevels (2 3 4 5) and (2 3 4 5). This should be fixed.
insserv: Script ssh has overlapping Default-Start and Default-Stop runlevels (2 3 4 5) and (2 3 4 5). This should be fixed.
insserv: Script sysstat has overlapping Default-Start and Default-Stop runlevels (2 3 4 5) and (2 3 4 5). This should be fixed.
insserv: Script ssh has overlapping Default-Start and Default-Stop runlevels (2 3 4 5) and (2 3 4 5). This should be fixed.
insserv: Script sysstat has overlapping Default-Start and Default-Stop runlevels (2 3 4 5) and (2 3 4 5). This should be fixed.
Created symlink /etc/systemd/system/multi-user.target.wants/ntp.service → /lib/systemd/system/ntp.service.

even after error, ntp gets started/ enabled.

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