Forum Post: Solution Import error...Updating RecurringAppointmentMaster.subject.Length but it's not valid for update. Original value:800. New value:400.

I am getting this error: Updating RecurringAppointmentMaster.subject.Length but it's not valid for update. Original value:800. New value:400. In the log it shows that it deals with the Appointment entity. Any help is appreciated. Thank you.