SQLSTATE[42S02]: Base table or view not found: 1146 Table 'mkstudent.classes_student' doesn't exist (SQL: insert into `classes_student` (`classes_id`, - laravel

Question

i dont know why it is going to store in mkstudent.classes_student table , i mean i created many to many table class_student and when i tray to store a a student that have a class this error is happening any one who can help me please?
the code is here
student controller
public function store(createstudentrequest $request)
{
$student= Student::create([
'first_name'=>$request->first_name,
'last_name'=>$request->last_name,
'phone_number'=>$request->phone_number
]);
if($request->class){
$student->classe()->attach($request->class);
}
session()->flash('success','student added successfully');
return redirect(route('students.index'));
}
student.create
<form action="{{route('students.store')}}" method="POST" enctype="multipart/form-data" >
#csrf
<div class="form-group">
<label for="title">First Name</label>
<input type="text" name="first_name" class="form-control" value="">
</div>
<div class="form-group">
<label for="title">Last Name</label>
<input type="text" name="last_name" class="form-control" value="">
</div>
<div class="form-group">
<label for="title">Phone Number</label>
<input type="text" name="phone_number" class="form-control" value="">
</div>
<div class="form-group">
<label for="Class">Class</label>
#if($classes->count() > 0)
<select name="class[]" id="class" multiple="true" class="form-control">
#foreach($classes as $class)
<option value="{{$class->id}}">
{{$class->name}}
</option>
#endforeach
</select>
#endif
</div>
and the migration for class_student is
public function up()
{
Schema::create('class_student', function (Blueprint $table) {
$table->bigIncrements('id');
$table->integer('classes_id');
$table->integer('student_id');
$table->timestamps();
});
}
and in the student model
class Student extends Model
{
protected $fillable = [
'first_name','last_name','phone_number'
];
public function classe()
{
return $this->belongsToMany(Classes::class);
}
}
in the classes model
public function students()
{
return $this->belongsToMany(Student::class);
}

Answer 1

You can pass table name as second parameter in 'classe' relation like this:
public function classe()
{
return $this->belongsToMany(Classes::class, 'class_student');
}

Answer 2

In relations (in both models) as second parameter you must provide table name class_student because you don't follow convention because you model name is Classes