opencart 2.0.3.1 to 2.3.0.2 upgradation error

I got this error after up-gradation from opencart 2.0.3.1 to 2.3.0.2.
Fatal error: Uncaught exception 'Exception' with message 'Error: Could not load model total!' in C:\xampp\htdocs\deleteme\system\engine\loader.php:169 Stack trace: #0 [internal function]: Loader->{closure}(Array, Array) #1 C:\xampp\htdocs\deleteme\system\engine\proxy.php(25): call_user_func_array(Object(Closure), Array) #2 C:\xampp\htdocs\deleteme\catalog\controller\common\cart.php(37): Proxy->__call('getTotal', Array) #3 C:\xampp\htdocs\deleteme\catalog\controller\common\cart.php(37): Proxy->getTotal(Array) #4 [internal function]: ControllerCommonCart->index(Array) #5 C:\xampp\htdocs\deleteme\system\engine\action.php(51): call_user_func_array(Array, Array) #6 C:\xampp\htdocs\deleteme\system\engine\loader.php(24): Action->execute(Object(Registry), Array) #7 C:\xampp\htdocs\deleteme\catalog\controller\common\header.php(129): Loader->controller('common/cart') #8 [internal function]: ControllerCommonHeader->index(Array) #9 C:\xampp\htdocs\deleteme\system\engine\action.php(51): call_user_func_array(Array, Array) #10 C:\xampp\ in C:\xampp\htdocs\deleteme\system\engine\loader.php on line 169
SOLUTION:
I delete the following folders and problem has been solved.
  • catalog/model/total
  • catalog/model/payment
  • catalog/controller/payment
  • catalog/model/shipping
  • catalog/controller/module
  • admin/controller/total
  • admin/controller/payment
  • admin/controller/shipping
  • admin/controller/module

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