Store data into database using request json string in laravel

I am having a table name Student ( id , name , division ). To store data into this table I am sending json string as a request to the api in laravel.

Request json string is,

{
"name":"abc",
"division":"a",
"city":"xyz"
}

Controller Code

 public function registerStudent(Request $request){

    $requestData = $request->json()->all(); 
    $studentModel = Student::create($requestData);

 }

Student Model

class Student extends Model
{
    protected $fillable = [
        'id', 'name','division'
    ];

   
}

When i execute this code , i get the following error,

Illuminate\Database\QueryException: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'city' in 'field list' (SQL: insert into `Student`... 

now my question here is, in what way I can store the data into database from json request with having extra keys into json object/array.

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