My ftp logs have continuous entries.

There are thousands of entries like this and continus always . Is this normal or i have to worry about this. Someone please help me .

Oct 4 15:07:56 dev-env systemd: Started Session c52 of user root.
Oct 4 15:07:56 dev-env systemd: Started Session c53 of user root.
Oct 4 15:07:56 dev-env systemd: Started Session c54 of user root.
Oct 4 15:07:56 dev-env systemd: Started Session c55 of user root.
Oct 4 15:08:02 dev-env systemd: Started Session c56 of user root.
Oct 4 15:08:17 dev-env systemd: Started Session c57 of user root.
Oct 4 15:08:19 dev-env systemd: Started Session c58 of user root.
Oct 4 15:08:19 dev-env systemd: Started Session c59 of user root.
Oct 4 15:08:34 dev-env systemd: Started Session c60 of user root.
Oct 4 15:08:34 dev-env systemd: Started Session c61 of user root.
Oct 4 15:08:45 dev-env systemd: Started Session c62 of user root.
Oct 4 15:08:45 dev-env systemd: Started Session c63 of user root.
Oct 4 15:08:45 dev-env systemd: Started Session c64 of user root.
Oct 4 15:08:58 dev-env systemd: Started Session c65 of user root.

totally normal and can be ignored/supressed. See > Logs flooded with systemd messages: Created slice, Starting Session - Red Hat Customer Portal

most likely due to root-owned cronjobs

thanks @whattheserver