I keep getting an Integrity constraint violation when I'm trying to submit data to db - laravel

Question

I have this problem and I have no idea why it's not working. I have tried so many code changes but I still get the same error when I try to submit a form. It's a simple form to insert data to tomany tables in db. All tables accept data with no error but payment_agrement table gives me this error:
SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (kassemschool.payment_agrements, CONSTRAINT payment_agrements_responisbleid_foreign FOREIGN KEY (responsible_id) REFERENCES payment_agrements (id)) (SQL: insert into payment_agrements (frais_inscription, payment_mois, Assurance, Garde, Transport, responsible_id, updated_at, created_at) values (450, 550, 400, 200, 300, 154, 2019-11-16 19:47:39, 2019-11-16 19:47:39))
This is my controller:
if(request()->has('rName')) {
$responsible = Responsible::create([
'ResponsibleName'=> $request->rName,
'ResponsibleCNI'=>$request->cni,
'responsible_number'=>$request->tele
]);
}
//Student::create($data);
if(request()->has('MontantP')) {
$payment=Payment::create([
'PaymentPaid'=>$request->MontantP,
'PaymentRemaining'=>$request->RestP,
'responsible_id'=>$responsible->id,
]);
}
if($request->hasFile('file')){
$student->images = $request->file->store('file');
}
if(request()->has('TransportR')) {
$transport=Transport::create([
'TransportPaid'=> $request->TransportP,
'TransportRemainning'=>$request->TransportR,
'TransportDateStart'=>$request->TdateStart,
'TransportDateEnd'=>$request->TdateEnd,
]);
}
if(request()->has('edateStart')) {
$payment_date = Payment_Date::create([
'PaymentDateStart'=>$request->edateStart,
'PaymentDateEnd'=>$request->edateEnd,
'payment_id'=>$payment->id,
]);
$letter = 'KassN';
$number =$request->env . 'G';
$number2 = $request->group;
$id='_'.rand();
$random = $letter.$number.$number2.$id;
if(request()->has('fName')) {
$student = Student::create([
'StudentFName'=> $request->fName,
'StudentLName'=> $request->lName,
'StudentDateStart'=>$request->edateStart,
'StudentDateEnd'=>$request->edateEnd,
'level_id'=> $request->env,
'group_id'=>$request->group,
'responsible_id'=> $responsible->id,
'payment_date_id'=>$payment_date->id,
'Payment_dure_id'=>$request->paymentD,
'payment_id'=>$payment->id,
'transport_id'=>$transport->id,
'student_code'=>$random
]);
}
if(request()->has('inscription')){
$agrement= Payment_agrement::create([
'frais_inscription'=>$request->inscription,
'payment_mois'=>$request->payment,
'Assurance'=>$request->assaurance,
'Garde'=>$request->garde,
'Transport'=>$request->fraiTransport,
'responsible_id'=>$responsible->id
]);
}
my create view
#extends('layouts.app')
#section('content')
#if (Route::has('login'))
#auth
#if (session('status'))
<div class="alert alert-success">
{{ session('status') }}
back to <strong>Home</strong>
back to <strong>list</strong>
</div>
#endif
<div class="mr-auto offset-md-1" style="width: 200px;">
<input type="button" class="btn btn-danger btn-sm" name="" value="<- Reteur">
</div>
<div class="card-body">
<div class="container" style="width: 80%;">
<form action="{{url('student')}}" method="POST">
{{ csrf_field() }}
<div class="form-group">
<label for="firstName">First Name </label>
<input type="text" class="form-control" name="fName" id="elastName">
</div>
<div class="form-group">
<label for="lastName">Last name:</label>
<input type="text" class="form-control" name="lName" id="efirstName">
</div>
<div class="form-group">
<label for="responsable">Responsable Name:</label>
<input type="text" class="form-control" name="rName" id="responsable">
</div>
<div class="form-group">
<label for="cni">Responsable CNI:</label>
<input type="text" class="form-control" name="cni" id="cni">
</div>
<div class="form-group">
<label for="nuveau">Niveau:</label>
<div class="input-group mb-3">
<div class="input-group-prepend">
<label class="input-group-text" for="nuveau">Options</label>
</div>
<select class="custom-select" id="nuveau" name="env">
<option selected>Choose...</option>
#foreach($levels as $level)
<option value="{{$level->id}}">{{$level->LevelName}} </option>
#endforeach
</select>
</div>
</div>
<div class="form-group">
<fieldset>
<legend>Aggrement:<hr></legend>
<div class="form-group">
<label for="cni">Frais de inscription:</label>
<input type="text" class="form-control" name="inscription" id="cni">
</div>
<div class="form-group">
<label for="cni">paiement mensuel:</label>
<input type="text" class="form-control" name="payment" id="cni">
</div>
<div class="form-group">
<label for="cni">Frais de Assurance:</label>
<input type="text" class="form-control" name="assaurance" id="cni">
</div>
<div class="form-group">
<label for="cni">Frais de Garde:</label>
<input type="text" class="form-control" name="garde" id="cni">
</div>
<div class="form-group">
<label for="cni">Frais de transport:</label>
<input type="text" class="form-control" name="fraiTransport" id="cni">
</div>
</fieldset>
</div>
<div class="form-group">
<label for="nuveau">Group:</label>
<div class="input-group mb-3">
<div class="input-group-prepend">
<label class="input-group-text" for="group">Options</label>
</div>
<select class="custom-select" id="nuveau" name="group">
<option selected>Choose...</option>
#foreach($groups as $group)
<option value="{{$group->id}}">{{$group->group_name}}</option>
#endforeach
</select>
</div>
</div>
<div class="form-group">
<label for="payment">Payment:</label>
<div class="input-group mb-3">
<div class="input-group-prepend">
<label class="input-group-text" for="payment">Options</label>
</div>
<select class="custom-select" id="payment" name="paymentD">
<option selected>Choose...</option>
#foreach($payment_dures as $payment_dure)
<option value="{{$payment_dure->id}}">{{$payment_dure->payment_dure_name}}</option>
#endforeach
</select>
</div>
</div>
<div class="form-group">
<label for="dateStart"></label>
<input type="date" class="#" id="dateStart" style="width: 49%;" name="edateStart">
<label for="dateEnd">au:</label>
<input type="date" class="#" id="dateEnd" style="width: 44%;" name="edateEnd">
</div>
<div class="form-group">
<label for="MontantP">Montant paye:</label>
<div class="input-group mb-3">
<input type="text" class="form-control" name="MontantP" placeholder="" id="MontantP">
<div class="input-group-append">
<span class="input-group-text">DH</span>
</div>
</div>
</div>
<div class="form-group">
<label for="RestP">Rest a paye paye:</label>
<div class="input-group mb-3">
<input type="text" class="form-control" placeholder="" id="MontantR" name="RestP">
<div class="input-group-append">
<span class="input-group-text">DH</span>
</div>
</div>
</div>
<p>
<a class="btn btn-primary" data-toggle="collapse" href="#multiCollapseExample1" role="button" aria-expanded="false" aria-controls="multiCollapseExample1" style="width: 100%">Bus subscribtion</a>
<div class="row">
<div class="col">
<div class="collapse multi-collapse" id="multiCollapseExample1">
<div class="card card-body">
<div class="form-group">
<div class="form-group">
<label for="TMontantP">Montant paye:</label>
<div class="input-group mb-3">
<input type="text" class="form-control" placeholder="" id="TMontantP" name="TransportP">
<div class="input-group-append">
<span class="input-group-text">DH</span>
</div>
</div>
</div>
<div class="form-group">
<label for="TRestP">Rest a paye paye:</label>
<div class="input-group mb-3">
<input type="text" class="form-control" placeholder="" id="TRestP" name="TransportR">
<div class="input-group-append">
<span class="input-group-text">DH</span>
</div>
</div>
</div>
<div class="form-group">
<label for="TdateStart"></label>
<input type="date" class="#" id="TdateStart" style="width: 48%;" name="TdateStart">
<label for="dTateEnd">au:</label>
<input type="date" class="#" id="TdateEnd" style="width: 44%;" name="TdateEnd">
</div>
</div>
</div>
</div>
</div>
</div>
</p>
<br>
<button type="submit" class="btn btn-secondary">Submit</button>
</form>
</div>
</div>
</div>
</div>
</div>
#else
<div class="d-flex justify-content-center text-center">
<div class="alert alert-danger" role="alert" style="width: 70%">
identifié vous d'abord
</div>
</div>
#endauth
#endif
#endsection

Answer 1

Looks like your foreign key constraint isn't setup correctly. From the look of the error you have setup payment_agrements.responsible_id to point to payment_agrements.id instead of responsibles.id.
In the migration for that table, that field probably looks like this:
$table->foreign('responsible_id')->references('id')->on('payment_agrements');
When it should be:
$table->foreign('responsible_id')->references('id')->on('responsibles');