diff --git a/src/Bundle/ChillPersonBundle/Entity/Person.php b/src/Bundle/ChillPersonBundle/Entity/Person.php
index f44cb1c30..f812739c4 100644
--- a/src/Bundle/ChillPersonBundle/Entity/Person.php
+++ b/src/Bundle/ChillPersonBundle/Entity/Person.php
@@ -293,7 +293,7 @@ class Person implements HasCenterInterface
      * Number of children
      * @var int
      *
-     * @ORM\Column(type="integer", options={"default" : 0})
+     * @ORM\Column(type="integer", nullable=true)
      */
     private $numberOfChildren;
 
diff --git a/src/Bundle/ChillPersonBundle/migrations/Version20210617073504.php b/src/Bundle/ChillPersonBundle/migrations/Version20210617073504.php
index 3a936e287..f9e96697d 100644
--- a/src/Bundle/ChillPersonBundle/migrations/Version20210617073504.php
+++ b/src/Bundle/ChillPersonBundle/migrations/Version20210617073504.php
@@ -23,7 +23,7 @@ final class Version20210617073504 extends AbstractMigration
         $this->addSql('ALTER TABLE chill_person_person ADD maritalStatusDate DATE DEFAULT NULL');
         $this->addSql('ALTER TABLE chill_person_person ADD acceptSMS BOOLEAN DEFAULT false NOT NULL');
         $this->addSql('ALTER TABLE chill_person_person ADD acceptEmail BOOLEAN DEFAULT false NOT NULL');
-        $this->addSql('ALTER TABLE chill_person_person ADD numberOfChildren INT DEFAULT 0 NOT NULL');
+        $this->addSql('ALTER TABLE chill_person_person ADD numberOfChildren INT DEFAULT NULL');
         $this->addSql('ALTER TABLE chill_person_person ADD genderComment_comment TEXT DEFAULT NULL');
         $this->addSql('ALTER TABLE chill_person_person ADD genderComment_userId INT DEFAULT NULL');
         $this->addSql('ALTER TABLE chill_person_person ADD genderComment_date TIMESTAMP(0) WITHOUT TIME ZONE DEFAULT NULL');