diff --git a/CHANGELOG.md b/CHANGELOG.md
index 15a2164ce..a19aa9495 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -22,6 +22,7 @@ and this project adheres to
 * [activity]: Ignore thirdparties when creating a social action via an activity (https://gitlab.com/champs-libres/departement-de-la-vendee/chill/-/issues/573)
 * [parcours]: change wording of warning message and button when user is not associated to a household yet (https://gitlab.com/champs-libres/departement-de-la-vendee/chill/-/issues/590#note_918370943)
 * [Accompanying period work evaluations] list documents associated to a work by creation date, and then by id, from the most recent to older
+* [Course comment] add validationConstraint NotNull and NotBlank on comment content, to avoid sql error
 
 ## Test releases
 
diff --git a/src/Bundle/ChillPersonBundle/Entity/AccompanyingPeriod/Comment.php b/src/Bundle/ChillPersonBundle/Entity/AccompanyingPeriod/Comment.php
index 105633e43..25851965f 100644
--- a/src/Bundle/ChillPersonBundle/Entity/AccompanyingPeriod/Comment.php
+++ b/src/Bundle/ChillPersonBundle/Entity/AccompanyingPeriod/Comment.php
@@ -19,6 +19,7 @@ use DateTimeInterface;
 use Doctrine\ORM\Mapping as ORM;
 use Symfony\Component\Serializer\Annotation\DiscriminatorMap;
 use Symfony\Component\Serializer\Annotation\Groups;
+use Symfony\Component\Validator\Constraints as Assert;
 
 /**
  * @ORM\Entity
@@ -40,6 +41,8 @@ class Comment implements TrackCreationInterface, TrackUpdateInterface
     /**
      * @ORM\Column(type="text")
      * @Groups({"read", "write"})
+     * @Assert\NotBlank()
+     * @Assert\NotNull()
      */
     private $content;
 
diff --git a/src/Bundle/ChillPersonBundle/Resources/views/AccompanyingCourse/Comment/index.html.twig b/src/Bundle/ChillPersonBundle/Resources/views/AccompanyingCourse/Comment/index.html.twig
index a8a5d78b8..d5ece68a9 100644
--- a/src/Bundle/ChillPersonBundle/Resources/views/AccompanyingCourse/Comment/index.html.twig
+++ b/src/Bundle/ChillPersonBundle/Resources/views/AccompanyingCourse/Comment/index.html.twig
@@ -40,6 +40,7 @@
         {% endif %}
             {{ form_start(form) }}
             {{ form_errors(form) }}
+            {{ form_errors(form.content) }}
             {{ form_widget(form.content) }}
             <ul class="record_actions">
                 <li>