The reason that this has happened is that you deleted the fields and when you added the fields back in the field keys are now different. There is no easy solution. One possibility would be to look in the table in the database and see if you can figure out what the old field key was. There will be an entry in the table where meta_key will equal `”_{$field_name}”… your field name preceded by an underscore. The meta_value will be the field_key. Find a post where the field has not been updated and you will probably be looking at the old field key. Replace this meta_value with the new field key in the entire table.
I should not need to say this, but I will anyway, back up your database before attempting to do this.
