Errors while installing Sentora 1.0.3 on CentOS 7

[betatester3.0]

First Error:

-- Installing Postfix
Package 2:postfix-2.10.1-6.el7.x86_64 already installed and latest version
ERROR 1005 (HY000) at line 98: Can't create table 'sentora_postfix.vacation_notification' (errno: 150)

Second Error:

Created symlink from /etc/systemd/system/multi-user.target.wants/httpd.service to /usr/lib/systemd/system/httpd.service.
Job for httpd.service failed because the control process exited with error code. See "systemctl status httpd.service" and "journalctl -xe" for details.

systemctl status httpd.service [response]:

[root@panel ~]# systemctl status httpd.service
● httpd.service - The Apache HTTP Server
Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled)
Active: active (running) since Sun 2017-09-03 11:52:43 SAST; 4min 7s ago
Docs: man:httpd(8)
man:apachectl(8)
Main PID: 987 (httpd)
Status: "Total requests: 0; Current requests/sec: 0; Current traffic: 0 B/sec"
CGroup: /system.slice/httpd.service
├─ 987 /usr/sbin/httpd -DFOREGROUND
├─1549 /usr/sbin/httpd -DFOREGROUND
├─1550 /usr/sbin/httpd -DFOREGROUND
├─1551 /usr/sbin/httpd -DFOREGROUND
├─1552 /usr/sbin/httpd -DFOREGROUND
└─1553 /usr/sbin/httpd -DFOREGROUND

Sep 03 11:52:42 panel.top.tld systemd[1]: Starting The Apache HTTP Server...
Sep 03 11:52:43 panel.top.tld systemd[1]: Started The Apache HTTP Server.

system looks okay from the above response, Should I look into these errors ?