POC for laravel/framework#31778 revert backport laravel pull/47450 because isDirty will sync/merge the cast cached objects

Author: Pantea Marius-ciclistu

illuminate/Database/Eloquent/Model.php

@@ -988,10 +988,6 @@ protected function incrementOrDecrement($column, $amount, $extra, $method)
             return 0;
         }
 
-        if ($this->isClassDeviable($column)) {
-            $amount = (clone $this)->setAttribute($column, $amount)->getAttributeFromArray($column);
-        }
-
         return tap(
             $this->setKeysForSaveQuery($this->newQueryWithoutScopes())->{$method}($column, $amount, $extra),
             function () use ($column) {