Working on a site with roughly 20,000+ nodes and I need to remove a field from the parent doc type all the rest of the doc types are nested under.  Whenever I attempt to remove it, I get a backoffice timeout preventing the operation. What can I do to increase this timeout?

I have this in the web.config, but seems to be ignored:

<httpRuntime requestValidationMode="2.0" relaxedUrlToFileSystemMapping="true" enableVersionHeader="false" maxUrlLength="512" maxRequestLength="512000" executionTimeout="1800" />

I really would like to avoid touching the database.