fix issues

src/Entity/Bill.php

@@ -111,7 +111,7 @@ class Bill implements EntityInterface
         return $this->date;
     }
 
-    public function setDate(\DateTimeInterface $date): self
+    public function setDate(?\DateTimeInterface $date): self
     {
         $this->date = $date;
 

src/Form/BillType.php

@@ -105,6 +105,7 @@ class BillType extends AbstractType
                     'label' => 'Montant TTC',
                     'html5' => true,
                     'scale' => 2,
+                    'required' => false,
                     'label_attr' => [
                         'class' => 'mt-3',
                     ],
@@ -116,6 +117,7 @@ class BillType extends AbstractType
                     'label' => 'Montant HT',
                     'scale' => 2,
                     'html5' => true,
+                    'required' => false,
                     'attr' => [
                         'step' => 0.01,
                     ],