I'm having the same issue as Xinil. Getting the same error.
Everthing was working fine until we moved data centers.
Now all of a sudden my virtualhost entries are overlapping? wtf?
Note, I am using my external IP in the VirtualHost Directive.
All my VirtualHost Directives are in /etc/apache2/vhosts/Vhosts_ispconfig.conf as I believe they should be.
I changed the IP in Vhosts_ispconfig.conf last night and I think it changed back to the old address this morning....Wierd....
Are there any Virtual host entries in your httpd.conf file? Also is the NameVirtualHost 18.104.22.168:80 in httpd.conf I dont see it in your ispconfig's vhost file.
There are no VirtualHost or NameVirtualHost entries in httpd.conf. Nor is there a NameVirtualHost directive in Vhosts_ispconfig.conf
# Include the virtual host configurations:
This directive in apache2.conf is confusing me...and it refers to file /etc/apache2/sites-enabled/default which has both NameVirtualHost *
and <VirtualHost *>