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PreMatch events do not need to be booked. If you have a Template with markets assigned for a competition, events will send markets through as soon as there is pricing available. It is possible to have an Empty template as a Default one, and only assign Templates with markets to some competitions, so you would only receive data for these specific competitions. But it is not possible to only receive PreMatch data for specific events.
The Default Template would be Empty to allow you and your teams to configure Competitions that you are interested in. Please set up your own new Template or use GeniusSports additional Templates built by our Trading teams and imported to your Settings to assign them for the Competitions you want us to publish Fixtures and Markets for. After the desired template is set up, it must be se as the Default template. You also need to remove any unwanted Competitions by having an Empty template assigned to them.