Illuminate\Database\QueryException thrown with message "SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails

Illuminate\Database\QueryException thrown with message "SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (laravelmlg.users, CONSTRAINT users_roles_id_foreign FOREIGN KEY (roles_id) REFERENCES users (id) ON DELETE CASCADE ON UPDATE CASCADE) (SQL: insert into users (username, name, email, password, roles_id, updated_at, created_at) values (firman, firman w, firmangetrich50@gmail.com, $2y$10$rtLCw2qRtheJl1sHEd462updY1xPa2dXDfAOxAuLV/kuqE1A7Rj7i, 2, 2017-11-28 06:26:05, 2017-11-28 06:26:05))"

Stacktrace: #64 Illuminate\Database\QueryException in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Database\Connection.php:664 #63 PDOException in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Database\Connection.php:458 #62 PDOStatement:execute in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Database\Connection.php:458 #61 Illuminate\Database\Connection:Illuminate\Database{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Database\Connection.php:657 #60 Illuminate\Database\Connection:runQueryCallback in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Database\Connection.php:624 #59 Illuminate\Database\Connection:run in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Database\Connection.php:459 #58 Illuminate\Database\Connection:statement in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Database\Connection.php:411 #57 Illuminate\Database\Connection:insert in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Database\Query\Processors\Processor.php:32 #56 Illuminate\Database\Query\Processors\Processor:processInsertGetId in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Database\Query\Builder.php:2135 #55 Illuminate\Database\Query\Builder:insertGetId in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Builder.php:1270 #54 Illuminate\Database\Eloquent\Builder:__call in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php:707 #53 Illuminate\Database\Eloquent\Model:insertAndSetId in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php:672 #52 Illuminate\Database\Eloquent\Model:performInsert in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Model.php:535 #51 Illuminate\Database\Eloquent\Model:save in D:\PKL\xampp\htdocs\alvl\app\Http\Controllers\RegisterController.php:27 #50 App\Http\Controllers\RegisterController:postRegis in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Routing\Controller.php:54 #49 call_user_func_array in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Routing\Controller.php:54 #48 Illuminate\Routing\Controller:callAction in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Routing\ControllerDispatcher.php:45 #47 Illuminate\Routing\ControllerDispatcher:dispatch in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Routing\Route.php:212 #46 Illuminate\Routing\Route:runController in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Routing\Route.php:169 #45 Illuminate\Routing\Route:run in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Routing\Router.php:658 #44 Illuminate\Routing\Router:Illuminate\Routing{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php:30 #43 Illuminate\Routing\Pipeline:Illuminate\Routing{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Routing\Middleware\SubstituteBindings.php:41 #42 Illuminate\Routing\Middleware\SubstituteBindings:handle in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:149 #41 Illuminate\Pipeline\Pipeline:Illuminate\Pipeline{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php:53 #40 Illuminate\Routing\Pipeline:Illuminate\Routing{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Foundation\Http\Middleware\VerifyCsrfToken.php:67 #39 Illuminate\Foundation\Http\Middleware\VerifyCsrfToken:handle in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:149 #38 Illuminate\Pipeline\Pipeline:Illuminate\Pipeline{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php:53 #37 Illuminate\Routing\Pipeline:Illuminate\Routing{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\View\Middleware\ShareErrorsFromSession.php:49 #36 Illuminate\View\Middleware\ShareErrorsFromSession:handle in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:149 #35 Illuminate\Pipeline\Pipeline:Illuminate\Pipeline{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php:53 #34 Illuminate\Routing\Pipeline:Illuminate\Routing{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Session\Middleware\StartSession.php:63 #33 Illuminate\Session\Middleware\StartSession:handle in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:149 #32 Illuminate\Pipeline\Pipeline:Illuminate\Pipeline{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php:53 #31 Illuminate\Routing\Pipeline:Illuminate\Routing{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse.php:37 #30 Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse:handle in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:149 #29 Illuminate\Pipeline\Pipeline:Illuminate\Pipeline{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php:53 #28 Illuminate\Routing\Pipeline:Illuminate\Routing{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Cookie\Middleware\EncryptCookies.php:59 #27 Illuminate\Cookie\Middleware\EncryptCookies:handle in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:149 #26 Illuminate\Pipeline\Pipeline:Illuminate\Pipeline{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php:53 #25 Illuminate\Routing\Pipeline:Illuminate\Routing{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:102 #24 Illuminate\Pipeline\Pipeline:then in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Routing\Router.php:660 #23 Illuminate\Routing\Router:runRouteWithinStack in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Routing\Router.php:635 #22 Illuminate\Routing\Router:runRoute in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Routing\Router.php:601 #21 Illuminate\Routing\Router:dispatchToRoute in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Routing\Router.php:590 #20 Illuminate\Routing\Router:dispatch in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Foundation\Http\Kernel.php:176 #19 Illuminate\Foundation\Http\Kernel:Illuminate\Foundation\Http{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php:30 #18 Illuminate\Routing\Pipeline:Illuminate\Routing{closure} in D:\PKL\xampp\htdocs\alvl\vendor\fideloper\proxy\src\TrustProxies.php:56 #17 Fideloper\Proxy\TrustProxies:handle in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:149 #16 Illuminate\Pipeline\Pipeline:Illuminate\Pipeline{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php:53 #15 Illuminate\Routing\Pipeline:Illuminate\Routing{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Foundation\Http\Middleware\TransformsRequest.php:30 #14 Illuminate\Foundation\Http\Middleware\TransformsRequest:handle in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:149 #13 Illuminate\Pipeline\Pipeline:Illuminate\Pipeline{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php:53 #12 Illuminate\Routing\Pipeline:Illuminate\Routing{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Foundation\Http\Middleware\TransformsRequest.php:30 #11 Illuminate\Foundation\Http\Middleware\TransformsRequest:handle in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:149 #10 Illuminate\Pipeline\Pipeline:Illuminate\Pipeline{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php:53 #9 Illuminate\Routing\Pipeline:Illuminate\Routing{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Foundation\Http\Middleware\ValidatePostSize.php:27 #8 Illuminate\Foundation\Http\Middleware\ValidatePostSize:handle in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:149 #7 Illuminate\Pipeline\Pipeline:Illuminate\Pipeline{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php:53 #6 Illuminate\Routing\Pipeline:Illuminate\Routing{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode.php:46 #5 Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode:handle in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:149 #4 Illuminate\Pipeline\Pipeline:Illuminate\Pipeline{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php:53 #3 Illuminate\Routing\Pipeline:Illuminate\Routing{closure} in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:102 #2 Illuminate\Pipeline\Pipeline:then in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Foundation\Http\Kernel.php:151 #1 Illuminate\Foundation\Http\Kernel:sendRequestThroughRouter in D:\PKL\xampp\htdocs\alvl\vendor\laravel\framework\src\Illuminate\Foundation\Http\Kernel.php:116 #0 Illuminate\Foundation\Http\Kernel:handle in D:\PKL\xampp\htdocs\alvl\public\index.php:55