Customer Schedule Forecast

Question, if you’re receiving customer schedule forecasts from Customers but they are for parts that are not Master Scheduled, where does that schedule go after releasing the schedule.  I see the Demand Line in Inventory Part Availability Planning with a status Planned.  But how do I clear that?  MRP is planning for this.  Typically when I import that into Master Scheduling, I no longer see the demand type of Customer Schedule Forecast, but for this case where I am not MS’ing this part, how do I clear that?