Hello – I have reached out to support and am praying all data is not lost :-).
I filled out this support form:
https://www.advancedcustomfields.com/contact/
And got a reply back…but my questions were not fully answered, so afraid to apply the updates.
If I hear back with solution I will post it here!
You might want to reach out to support as well.
And reference this thread.
This thread is the ‘Community’ forum.
Thanks for posting.
I am certain ACF can fix this as they are top-notch!