resource setup

app/Models/WinningBids.php

@@ -7,6 +7,9 @@ use Illuminate\Database\Eloquent\Model;
 class WinningBids extends Model
 {
     protected $table = 'winning_bids';
+
+    protected $primaryKey = 'idwinning_bids';
+
     protected $fillable = [
     'winning_bidder_num',
     'winning_cost',