Install Odoo 9 – CentOS 7
I've found that if you insist on installing Odoo on CentOS, like I do, doing…
Look for the exact name of the installed rpm you want to remove
Copy the complete line of the rpm you want to remove and issue the following to remove
Note: Make sure that the rpm you are removing isn’t a dependency of another program. Messing around with these could break your server.