Need some help with upgrade - from 7.3 to 7.9.1 LTS (throws start-limit-hit error)

I have followed https://docs.sonarqube.org/latest/setup/upgrading/ and https://docs.sonarqube.org/latest/setup/upgrade-notes/

I tried upgrading directly from 7.3 to 7.9.1 LTS, hope there isn’t any LTS in between ?
SonarQube is running as a service, and I have replaced 7.3 to 7.9.1 in the etc/systemd/system/sonarqube.service file

The errors when I try starting up the new server are:
shakir@sonarQubeServer:~$ sudo systemctl start sonarqube

shakir@sonarQubeServer:~$ sudo systemctl status sonarqube.service
● sonarqube.service - SonarQube service
Loaded: loaded (/etc/systemd/system/sonarqube.service; enabled; vendor preset: enabled)
Active: failed (Result: start-limit-hit) since Wed 2019-08-21 07:08:31 UTC; 11min ago
Process: 13259 ExecStop=/opt/sonarqube/sonarqube-7.9.1/bin/linux-x86-64/sonar.sh stop (code=exited, status=0/SUCCESS)
Process: 13192 ExecStart=/opt/sonarqube/sonarqube-7.9.1/bin/linux-x86-64/sonar.sh start (code=exited, status=0/SUCCESS

Aug 21 07:08:31 sonarQubeServer systemd[1]: Started SonarQube service.
Aug 21 07:08:31 sonarQubeServer systemd[1]: sonarqube.service: Service hold-off time over, scheduling restart.
Aug 21 07:08:31 sonarQubeServer systemd[1]: sonarqube.service: Scheduled restart job, restart counter is at 5.
Aug 21 07:08:31 sonarQubeServer systemd[1]: Stopped SonarQube service.
Aug 21 07:08:31 sonarQubeServer systemd[1]: sonarqube.service: Start request repeated too quickly.
Aug 21 07:08:31 sonarQubeServer systemd[1]: sonarqube.service: Failed with result ‘start-limit-hit’.
Aug 21 07:08:31 sonarQubeServer systemd[1]: Failed to start SonarQube service.
Aug 21 07:08:31 sonarQubeServer systemd[1]: sonarqube.service: Service hold-off time over, scheduling restart.
Aug 21 07:08:31 sonarQubeServer systemd[1]: sonarqube.service: Scheduled restart job, restart counter is at 5.
Aug 21 07:08:31 sonarQubeServer systemd[1]: Stopped SonarQube service.
Aug 21 07:08:31 sonarQubeServer systemd[1]: sonarqube.service: Start request repeated too quickly.
Aug 21 07:08:31 sonarQubeServer systemd[1]: sonarqube.service: Failed with result ‘start-limit-hit’.
Aug 21 07:08:31 sonarQubeServer systemd[1]: Failed to start SonarQube service.

The wrapper configuration is exactly the same
shakir@sonarQubeServer:/opt/sonarqube$ diff sonarqube-7.3/conf/wrapper.conf sonarqube-7.9.1/conf/wrapper.conf