error

{
    "message": "SQLSTATE[22007]: Invalid datetime format: 1366 Incorrect decimal value: 'a' for column `sistesi`.`educational_histories`.`last_point` at row 1 (SQL: insert into `educational_histories` (`person`, `level`, `institution_name`, `institution_id`, `address`, `started`, `finished`, `attachment`, `certificate_number`, `accreditation`, `last_point`, `updated_at`, `created_at`) values (786, 1, a, ?, ?, 2000, 2001, 200, a, A, a, 2020-02-19 16:52:47, 2020-02-19 16:52:47))",
    "exception": "Illuminate\\Database\\QueryException",
    "file": "/var/www/html/api/vendor/illuminate/database/Connection.php",
    "line": 669,
    "trace": [
        {
            "file": "/var/www/html/api/vendor/illuminate/database/Connection.php",
            "line": 629,
            "function": "runQueryCallback",
            "class": "Illuminate\\Database\\Connection",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/vendor/illuminate/database/Connection.php",
            "line": 464,
            "function": "run",
            "class": "Illuminate\\Database\\Connection",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/vendor/illuminate/database/Connection.php",
            "line": 416,
            "function": "statement",
            "class": "Illuminate\\Database\\Connection",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/vendor/illuminate/database/Query/Processors/Processor.php",
            "line": 32,
            "function": "insert",
            "class": "Illuminate\\Database\\Connection",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/vendor/illuminate/database/Query/Builder.php",
            "line": 2672,
            "function": "processInsertGetId",
            "class": "Illuminate\\Database\\Query\\Processors\\Processor",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/vendor/illuminate/database/Eloquent/Builder.php",
            "line": 1366,
            "function": "insertGetId",
            "class": "Illuminate\\Database\\Query\\Builder",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/vendor/illuminate/database/Eloquent/Model.php",
            "line": 839,
            "function": "__call",
            "class": "Illuminate\\Database\\Eloquent\\Builder",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/vendor/illuminate/database/Eloquent/Model.php",
            "line": 804,
            "function": "insertAndSetId",
            "class": "Illuminate\\Database\\Eloquent\\Model",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/vendor/illuminate/database/Eloquent/Model.php",
            "line": 667,
            "function": "performInsert",
            "class": "Illuminate\\Database\\Eloquent\\Model",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/vendor/illuminate/database/Eloquent/Builder.php",
            "line": 765,
            "function": "save",
            "class": "Illuminate\\Database\\Eloquent\\Model",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/vendor/illuminate/support/helpers.php",
            "line": 422,
            "function": "Illuminate\\Database\\Eloquent\\{closure}",
            "class": "Illuminate\\Database\\Eloquent\\Builder",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/vendor/illuminate/database/Eloquent/Builder.php",
            "line": 766,
            "function": "tap"
        },
        {
            "file": "/var/www/html/api/vendor/illuminate/support/Traits/ForwardsCalls.php",
            "line": 23,
            "function": "create",
            "class": "Illuminate\\Database\\Eloquent\\Builder",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/vendor/illuminate/database/Eloquent/Model.php",
            "line": 1620,
            "function": "forwardCallTo",
            "class": "Illuminate\\Database\\Eloquent\\Model",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/vendor/illuminate/database/Eloquent/Model.php",
            "line": 1632,
            "function": "__call",
            "class": "Illuminate\\Database\\Eloquent\\Model",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/app/Http/Controllers/Api/EducationHistoryController.php",
            "line": 33,
            "function": "__callStatic",
            "class": "Illuminate\\Database\\Eloquent\\Model",
            "type": "::"
        },
        {
            "file": "/var/www/html/api/app/Http/Controllers/Api/ApplicationController.php",
            "line": 485,
            "function": "insert",
            "class": "App\\Http\\Controllers\\Api\\EducationHistoryController",
            "type": "->"
        },
        {
            "function": "apply_employee",
            "class": "App\\Http\\Controllers\\Api\\ApplicationController",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/vendor/illuminate/container/BoundMethod.php",
            "line": 32,
            "function": "call_user_func_array"
        },
        {
            "file": "/var/www/html/api/vendor/illuminate/container/Util.php",
            "line": 36,
            "function": "Illuminate\\Container\\{closure}",
            "class": "Illuminate\\Container\\BoundMethod",
            "type": "::"
        },
        {
            "file": "/var/www/html/api/vendor/illuminate/container/BoundMethod.php",
            "line": 90,
            "function": "unwrapIfClosure",
            "class": "Illuminate\\Container\\Util",
            "type": "::"
        },
        {
            "file": "/var/www/html/api/vendor/illuminate/container/BoundMethod.php",
            "line": 34,
            "function": "callBoundMethod",
            "class": "Illuminate\\Container\\BoundMethod",
            "type": "::"
        },
        {
            "file": "/var/www/html/api/vendor/illuminate/container/Container.php",
            "line": 590,
            "function": "call",
            "class": "Illuminate\\Container\\BoundMethod",
            "type": "::"
        },
        {
            "file": "/var/www/html/api/vendor/laravel/lumen-framework/src/Concerns/RoutesRequests.php",
            "line": 376,
            "function": "call",
            "class": "Illuminate\\Container\\Container",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/vendor/laravel/lumen-framework/src/Concerns/RoutesRequests.php",
            "line": 342,
            "function": "callControllerCallable",
            "class": "Laravel\\Lumen\\Application",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/vendor/laravel/lumen-framework/src/Concerns/RoutesRequests.php",
            "line": 316,
            "function": "callLumenController",
            "class": "Laravel\\Lumen\\Application",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/vendor/laravel/lumen-framework/src/Concerns/RoutesRequests.php",
            "line": 278,
            "function": "callControllerAction",
            "class": "Laravel\\Lumen\\Application",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/vendor/laravel/lumen-framework/src/Concerns/RoutesRequests.php",
            "line": 263,
            "function": "callActionOnArrayBasedRoute",
            "class": "Laravel\\Lumen\\Application",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/vendor/laravel/lumen-framework/src/Concerns/RoutesRequests.php",
            "line": 165,
            "function": "handleFoundRoute",
            "class": "Laravel\\Lumen\\Application",
            "type": "->"
        },
        {
            "function": "Laravel\\Lumen\\Concerns\\{closure}",
            "class": "Laravel\\Lumen\\Application",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/vendor/laravel/lumen-framework/src/Routing/Pipeline.php",
            "line": 52,
            "function": "call_user_func"
        },
        {
            "file": "/var/www/html/api/app/Http/Middleware/CorsMiddleware.php",
            "line": 30,
            "function": "Laravel\\Lumen\\Routing\\{closure}",
            "class": "Laravel\\Lumen\\Routing\\Pipeline",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/vendor/illuminate/pipeline/Pipeline.php",
            "line": 171,
            "function": "handle",
            "class": "App\\Http\\Middleware\\CorsMiddleware",
            "type": "->"
        },
        {
            "function": "Illuminate\\Pipeline\\{closure}",
            "class": "Illuminate\\Pipeline\\Pipeline",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/vendor/laravel/lumen-framework/src/Routing/Pipeline.php",
            "line": 32,
            "function": "call_user_func"
        },
        {
            "file": "/var/www/html/api/vendor/illuminate/pipeline/Pipeline.php",
            "line": 105,
            "function": "Laravel\\Lumen\\Routing\\{closure}",
            "class": "Laravel\\Lumen\\Routing\\Pipeline",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/vendor/laravel/lumen-framework/src/Concerns/RoutesRequests.php",
            "line": 413,
            "function": "then",
            "class": "Illuminate\\Pipeline\\Pipeline",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/vendor/laravel/lumen-framework/src/Concerns/RoutesRequests.php",
            "line": 171,
            "function": "sendThroughPipeline",
            "class": "Laravel\\Lumen\\Application",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/vendor/laravel/lumen-framework/src/Concerns/RoutesRequests.php",
            "line": 108,
            "function": "dispatch",
            "class": "Laravel\\Lumen\\Application",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/public/index.php",
            "line": 28,
            "function": "run",
            "class": "Laravel\\Lumen\\Application",
            "type": "->"
        },
        {
            "file": "/var/www/html/api/index.php",
            "line": 21,
            "function": "require_once"
        }
    ]
}