If an email address exists on both client records and both email addresses have logged into a MassageBook client account, the clients cannot be merged. This is considered merging two active MassageBook records and cannot be completed.
If an email address exists on both client records but only one email address has logged into a MassageBook client account, the record that has not logged into MassageBook must merge into the record that has logged in. This is considered merging an inactive record in an active record; the active record will always serve as the primary record.
A message displaying "These records could not be merged" will display if the records do not meet the appropriate merge criteria.