Thank you for posting your question. You can edit the existing Bluejeans meeting on google calendar if it is scheduled using Bluejeans chrome extension. You need to open the calendar event and remove the bluejeans info from "Location" and invite "body" and save the event. This will remove the Bluejeans info from event and maintain the appointment in the calendar.
I hope this is helpful!
Please let me know if you have any follow up questions.