ExpressionChangedAfterItHasBeenCheckedError - Expression has changed after it was checked

export class BankAccount implements OnChanges{
  ngOnChanges(changes: SimpleChanges): void {
    /*console.log('ngOnChanges triggered: ' + changes.bankName.currentValue + ' previous value: ' + changes.bankName.previousValue);*/
  }
  // This property is bound using its original name.
  /*
  @Input()
  set bankName(newName) {
    console.log('bankName new value set: ' + newName);
  }*/
  @Input()
  bankName:string;
  // this property value is bound to a different property name
  // when this component is instantiated in a template.
  @Input('account-id') 
  id: string;
  // this property is not bound, and is not automatically updated by Angular
  normalizedBankName: string;
}
@Component({
  selector: 'app',
  template: `
    <bank-account [bankName]="bankName" account-id="4747"></bank-account>
  `
})
export class App implements OnInit, AfterViewInit{
  _bankName = 'Jerry';
  ngAfterViewInit(): void {
    this._bankName = 'Jerry2';
  }
  get bankName(){
    return this._bankName;
  }
  ngOnInit(): void {
  }
}