What does "Abandoned" on attendee list means?

The attendee list of "Abandoned" includes the following attendees:

- People who did not complete the online payment within 30 minutes after they submit the registration form

Xtra Tip:

- The EMS automatically move the attendee status to "Abandoned" when the registrant submits the registration form and did not settle the online payment in 30 minutes.

- "Abandoned" status cannot be manually changed or set the attendee status to "Abandoned"