diff --git a/class/MesBR.php b/class/MesBR.php
index 92e8c34..a6c39a1 100644
--- a/class/MesBR.php
+++ b/class/MesBR.php
@@ -61,6 +61,10 @@ class MesBR
 
         $res = $this->callAPI("GET", "/updatebasket", $datas);
 
+        if (!$res) {
+            error_log("MESBR - CODE : 999 - MESSAGE : Cannot read API Response (non json)");
+            return ['status' => 'KO', 'code' => 999, 'message' => 'Cannot read API Response (non json)'];
+        }
         if ($res->Statut === 'KO') {
             error_log("MESBR - CODE : $res->Code - MESSAGE : $res->Message");
             return ['status' => 'KO', 'code' => $res->Code, 'message' => $res->Message];
diff --git a/database/migrations/2021_09_29_173331_make_instant_win_unique_in_participation.php b/database/migrations/2021_09_29_173331_make_instant_win_unique_in_participation.php
new file mode 100644
index 0000000..3831f7f
--- /dev/null
+++ b/database/migrations/2021_09_29_173331_make_instant_win_unique_in_participation.php
@@ -0,0 +1,32 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class MakeInstantWinUniqueInParticipation extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('participation', function (Blueprint $table) {
+            $table->unique('instant_win_id');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('participation', function (Blueprint $table) {
+            //
+        });
+    }
+}