Reply To: rwmb_{$field_id}_after_save_field

Hi,

Is the $prefix = property or _property? _property matches the action rwmb__property_level_after_save_field (In this case, $field_id is _property_level).

I see you are trying to copy values from old fields to new fields. Please note that, this action happens after field _property_level is saved. It doesn't guarantee that it happens before or after other fields are saved.