I have a sub-domain network installation on www.example.com

One of the sites is rabbit.example.com

This site used to have a domain mapping to www.rabbit.com.

I removed this mapping.

However, when I go to http://rabbit.example.com/wp-admin, it forwards me to http://www.rabbit.com/wp-admin

I have checked the site settings for rabbit.example.com, and the base URL and home URL are set to rabbit.example.com.

I have double-checked the domain mapping is no longer there.

I do not have a caching plugin installed.

The site’s database table, wp_10_options, has the site URL as rabbit.example.com

Any ideas?