Adding an add-on after registering for an event

[Midwest_Writers]

One of the add-ons for my event is a lunch. Sometimes a registrant changes their mind and decides to add a lunch after they've registered. How can I do this? 

Right now, I'm re-registering them and canceling the original registration, which is cumbersome. Please help. 

[William_A · Accepted solution]

Hello @Midwest_Writers ,

This is the only way to do it at this time, since addons are directly tied into the registration process as a whole.