_default_ VirtualHost overlap on port 80, the first has precedence

While restarting the apache server for an application serving requests from muliple domains,it keeps saying that

_default_ VirtualHost overlap on port 80, the first has precedence

The problem is that the NameVirutalHost is commented or may not be there. Make sure your NameVirtualHost line in httpd.conf is uncommented or written as:

NameVirtualHost *:80