Migrating Goolge Calendars from one workspace to another.

[Rob.]

I'm working on migrating on Google Workspace B into our Google Workspace A.  We will be making the domain of B a subdomain of A.

I'm currently working on a plan to move the calendars between the domains.  I've used the print function for events to pull the entire calendar for a users
gam user userA...@domain.com print events todrive tduser userA...@domain.com

Saved the information as a CSV and them attempted to import the information to a different user.

gam csv "calendar.csv" gam user userB...@domain.com import event userB...@domain.com icaluid "~iCalUID" organizeremail "~organizer.email"

It processes the file but throws an error:  Calendar: userB...@domain.com, Event: Unknown, Import Failed: Missing end time.

Has anyone else attempted this before?  I'd rather not sink more time into this process if it not possible.

Context:  There was a migration into our domain before I worked with Google Workspaces and it broke all of the meetings.  We want to preserve all calendar events info: event name, ID, Google Meet link, all internal and external meeting members.

Not sure why Google hasn't made domain integration easier.