In Chargebee, you can remove the existing addons and replace them with the new ones by passing the replace_addon_list parameter as “true”.
Note: If you want your addon changes to reflect in the next billing term, pass the "end_of_term" parameter as “true” in the “Update a Subscription" API.
For the changes to reflect immediately, pass this parameter as "false".
Tip: You can retrieve the subscription with the scheduled changes, using the Retrieve a Subscription API and list the addons added for the next billing term for your subscription.
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