DAO_ContactOrg(93):Duplicate entry '0' for key 'PRIMARY'
The issue was the lack of AUTOINCREMENT on the contact_org table since we dropped sequences.
It wouldn't have been a problem adding an org directly from the address book too.
It's a little sneaky, since adding the first org during testing works because it's assigned an ID of 0. However, a second org can't be created which duplicates ID = 0.
Fixed!