Ion-icon disable when page loading

Hi,
My project is hotel management to waiter get order. For table selection choose table seats. My doubt is Already selected table seats i change icon color in red by page loading. Now, disable already selected icon by page loading sir. Please help me.
image

My code,
<ion-icon class="" [ngClass]=“table.IsOccupied?‘person-occupied’:‘person-not-occupied’” (click)=“CheckSeat($event,table.SeatNo,table.IsOccupied)” name=“person” tappable >