Changing a row in the database should not affect the schema version. This should be executed as proper queries to manipulate the database entries.
You might find use of this method:
public void clearDatabase(Context context) {
DatabaseHelper helper = new DBHelper(context);
SQLiteDatabase database = helper.getWritableDatabase();
database.delete(DATABASE_TABLE, null, null); //erases everything in the table.
database.close();
}