Android: column _id does not exist

Question

I'm currently working on loading the data from SQLite database to ListView. So I'm using the SimpleCursorAdapter.

Here's the initListView() method in the activity part that loads data and shows in the list view.

private void initListView() {

    Cursor cursor = db.fetchAllPostLists();
    String[] columns = {
            DataKeyLists.KEY_UPLOADER,
            DataKeyLists.KEY_CONTENT,
            DataKeyLists.KEY_UPLOADED_AT
    };

    int[] to = {
            R.id.tvFeedUsername,
            R.id.tvFeedText,
            R.id.tvFeedCreated,
    };

    FeedAdapter adapter = new FeedAdapter(this, R.layout.feed_item, cursor, columns, to, 0);
    listView.setAdapter(adapter);
}

the FeedAdapter class is as follows.

public class FeedAdapter extends SimpleCursorAdapter {
    public FeedAdapter(Context context, int layout, Cursor cursor, String[] from, int[] to, int flags) {
        super(context, layout, cursor, from, to, flags);
        this.context = context;
        inflater = LayoutInflater.from(context);
    }
}

When I try to open the activity, the app quits, leaving this message: java.lang.IllegalArgumentException: column '_id' does not exist

According to the LogCat, the exception is caused in the super() constructor part in the FeedAdapter class. How should I solve this?

Edited This is the fetchAllPostLists() method.

public Cursor fetchAllPostLists() {
    SQLiteDatabase db = this.getReadableDatabase();
    Cursor cursor = db.query(TABLE_POST, new String[] {KEY_POST_ID, KEY_UPLOADER, KEY_CONTENT, KEY_PRIVACY_LEVEL, KEY_UPLOADED_AT, KEY_EDITED_AT}, null, null, null, null, null);

    if(cursor != null) {
        cursor.moveToFirst();
    }
    db.close();

    return cursor;
}