I have received this message after typing this in (sudo /etc/init.d/apache2 restart)

[....] Restarting apache2 (via systemctl): apache2.serviceJob for apache2.service failed because the control process exited with error code.
See “systemctl status apache2.service” and “journalctl -xe” for details.

And I have typed this in (sudo journalctl -xe)
Result:
– Unit apache2.service has begun starting up.
Jan 08 13:54:00 raspberrypi apachectl[12922]: AH00558: apache2: Could not reliably determine the server’s fully qualified domain name, using 127.0.1
Jan 08 13:54:00 raspberrypi apachectl[12922]: (98)Address already in use: AH00072: makesock: could not bind to address [::]:80
Jan 08 13:54:00 raspberrypi apachectl[12922]: (98)Address already in use: AH00072: makesock: could not bind to address 0.0.0.0:80
Jan 08 13:54:00 raspberrypi apachectl[12922]: no listening sockets available, shutting down
Jan 08 13:54:00 raspberrypi apachectl[12922]: AH00015: Unable to open logs
Jan 08 13:54:00 raspberrypi apachectl[12922]: Action ‘start’ failed.
Jan 08 13:54:00 raspberrypi apachectl[12922]: The Apache error log may have more information.
Jan 08 13:54:00 raspberrypi systemd[1]: apache2.service: Control process exited, code=exited status=1
Jan 08 13:54:00 raspberrypi systemd[1]: Failed to start The Apache HTTP Server.
– Subject: Unit apache2.service has failed
– Defined-By: systemd

– Support: https://www.debian.org/support

– Unit apache2.service has failed.

– The result is failed.
Jan 08 13:54:00 raspberrypi systemd[1]: apache2.service: Unit entered failed state.
Jan 08 13:54:00 raspberrypi systemd[1]: apache2.service: Failed with result 'exit-code’.
Jan 08 13:54:00 raspberrypi sudo[12907]: pamunix(sudo:session): session closed for user root
Jan 08 13:54:29 raspberrypi sudo[12967]: pi : TTY=pts/0 ; PWD=/home/pi ; USER=root ; COMMAND=/bin/journalctl -xe
Jan 08 13:54:29 raspberrypi sudo[12967]: pamunix(sudo:session): session opened for user root by (uid=0)
Jan 08 13:55:01 raspberrypi CRON[12975]: pamunix(cron:session): session opened for user pi by (uid=0)
Jan 08 13:55:01 raspberrypi CRON[12979]: (pi) CMD (python /home/pi/insertDB.py)
Jan 08 13:55:01 raspberrypi CRON[12975]: (CRON) info (No MTA installed, discarding output)
Jan 08 13:55:01 raspberrypi CRON[12975]: pamunix(cron:session): session closed for user pi
Jan 08 13:57:50 raspberrypi sudo[12967]: pamunix(sudo:session): session closed for user root
Jan 08 13:57:58 raspberrypi sudo[12998]: pi : TTY=pts/0 ; PWD=/home/pi ; USER=root ; COMMAND=/bin/journalctl -xe
Jan 08 13:57:58 raspberrypi sudo[12998]: pamunix(sudo:session): session opened for user root by (uid=0)
Jan 08 13:58:01 raspberrypi sudo[12998]: pamunix(sudo:session): session closed for user root
Jan 08 13:58:21 raspberrypi sudo[13018]: pi : TTY=pts/0 ; PWD=/home/pi ; USER=root ; COMMAND=/bin/journalctl -xe
Jan 08 13:58:21 raspberrypi sudo[13018]: pamunix(sudo:session): session opened for user root by (uid=0)
Jan 08 13:58:24 raspberrypi sudo[13018]: pamunix(sudo:session): session closed for user root
Jan 08 13:58:34 raspberrypi sudo[13031]: pi : TTY=pts/0 ; PWD=/home/pi ; USER=root ; COMMAND=/bin/journalctl -xe
Jan 08 13:58:34 raspberrypi sudo[13031]: pamunix(sudo:session): session opened for user root by (uid=0)

Can anyone teach me how to solve this issue? Thank You