App crash when item removed from recycler view.

[KaanRF]

App is crashing when item is removed from recyclerview. Because this position not existed anymore and application is brake in isSection

` @OverRide public boolean isSection(int position) {
boolean result = position == 0 ||
getItem( position ).getTransaction().getTimeStamp().getMonth() !=
getItem( position - 1 ).getTransaction().getTimeStamp().getMonth();

    return result;
}

@Override public CharSequence getSectionHeader(int position) {
    DateFormat dateFormat = new SimpleDateFormat( "MM/yyyy" );
    return dateFormat.format( getItem( position ).getTransaction().getTimeStamp() );
}`

Do you have any suggestion how can I avoid that without app crash ?