How to prevent over booking

I have an event with 2 spaces available

When first person books with individual booking they can choose a radio button to book both places for themselves. This works fine using a custom field that uses the "number_PrivateRegistration" plugin to allocate the extra place

The problem is that if the first visitor books just one place and a second visitor tries to book 2 places the system will allow him to do so

What I would like to achieve is that if 1 person has already booked a place meaning there is now only 1 place left, the Book both places radio field is not displayed. Does anyone have any suggestions on how to do this please?

Hello Steve

It is actually, just an individual registration and number registrant is treated as 1, so it is working as how it is. The plugin which is used to update number registrants base on value entered in custom fields can just be used as a workaround

For this problem, if you want to prevent over booking, you would have to use Individual / Group registration instead

The idea is that one he wants to book 1, choose individual registration. If he wants to book 2, choose group registration. In your case, I guess you don't need to collect members information, so go to Events Booking -> Configuration, set the config option Collect Members Information in Group Registration to No

Then check it again to see whether it works

Regards,

Tuan