After making changes to any bundle product association, you must run a bundle maintenance batch that synchronizes all the bundles and options.
You can also use the Update View button from the Bundle and Option Manager page to run maintenance of view record for individual bundles. It is necessary to run maintenance when a new bundle or bundle options are added or removed. To make sure that all bundles have view records, use the Bundle Maintenance tab to run a bundle maintenance batch to update view records for all bundles. The bundle maintenance tab uses the Update Bundle Components page to run the batch.
Changes made in option properties such as MinQuanity or IsDefault do not require you to run bundle maintenance.
Refer to Running Maintenance Jobs in CPQ on Salesforce Administrator Guide.