diff --git a/.changes/unreleased/Fixed-20241205-151629.yaml b/.changes/unreleased/Fixed-20241205-151629.yaml
new file mode 100644
index 000000000..bf5c94b11
--- /dev/null
+++ b/.changes/unreleased/Fixed-20241205-151629.yaml
@@ -0,0 +1,5 @@
+kind: Fixed
+body: Remove the "not null" constraint on person supplementary phones
+time: 2024-12-05T15:16:29.001240887+01:00
+custom:
+    Issue: ""
diff --git a/src/Bundle/ChillActivityBundle/Entity/Activity.php b/src/Bundle/ChillActivityBundle/Entity/Activity.php
index 408c27ed8..4701d2483 100644
--- a/src/Bundle/ChillActivityBundle/Entity/Activity.php
+++ b/src/Bundle/ChillActivityBundle/Entity/Activity.php
@@ -84,11 +84,6 @@ class Activity implements AccompanyingPeriodLinkedWithSocialIssuesEntityInterfac
      */
     #[Assert\Valid(traverse: true)]
     #[ORM\ManyToMany(targetEntity: StoredObject::class, cascade: ['persist'])]
-    #[ORM\JoinTable(
-        name: 'activity_storedobject',
-        joinColumns: new ORM\JoinColumn(name: 'activity_id', referencedColumnName: 'id', nullable: false),
-        inverseJoinColumns: new ORM\InverseJoinColumn(name: 'storedobject_id', referencedColumnName: 'id', unique: true, nullable: false)
-    )]
     private Collection $documents;
 
     #[ORM\Column(type: \Doctrine\DBAL\Types\Types::TIME_MUTABLE, nullable: true)]
diff --git a/src/Bundle/ChillMainBundle/migrations/Version20241205140905.php b/src/Bundle/ChillMainBundle/migrations/Version20241205140905.php
new file mode 100644
index 000000000..2098865cf
--- /dev/null
+++ b/src/Bundle/ChillMainBundle/migrations/Version20241205140905.php
@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\Migrations\Main;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+final class Version20241205140905 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Restore the nullable person phone, as this is used by comments';
+    }
+
+    public function up(Schema $schema): void
+    {
+        // this should be already not null, but helps some instances, where a migration which drop not null
+        // was executed, and was wrong.
+        $this->addSql('ALTER TABLE chill_person_phone ALTER phonenumber DROP NOT NULL');
+    }
+
+    public function down(Schema $schema): void {}
+}
diff --git a/src/Bundle/ChillPersonBundle/Entity/PersonPhone.php b/src/Bundle/ChillPersonBundle/Entity/PersonPhone.php
index 8edf4411a..78e1015b8 100644
--- a/src/Bundle/ChillPersonBundle/Entity/PersonPhone.php
+++ b/src/Bundle/ChillPersonBundle/Entity/PersonPhone.php
@@ -20,7 +20,6 @@ use libphonenumber\PhoneNumber;
 #[ORM\Entity]
 #[ORM\Table(name: 'chill_person_phone')]
 #[ORM\Index(name: 'phonenumber', columns: ['phonenumber'])]
-#[ORM\Index(name: 'phonenumber', columns: ['phonenumber'])]
 class PersonPhone
 {
     #[ORM\Column(type: \Doctrine\DBAL\Types\Types::DATETIME_MUTABLE, nullable: false)]
@@ -37,7 +36,12 @@ class PersonPhone
     #[ORM\ManyToOne(targetEntity: Person::class, inversedBy: 'otherPhoneNumbers')]
     private Person $person;
 
-    #[ORM\Column(type: 'phone_number', nullable: false)]
+    /**
+     * The phonenumber.
+     *
+     * This phonenumber is nullable: this allow user to store some notes instead of a phonenumber
+     */
+    #[ORM\Column(type: 'phone_number', nullable: true)]
     private ?PhoneNumber $phonenumber = null;
 
     #[ORM\Column(type: \Doctrine\DBAL\Types\Types::TEXT, length: 40, nullable: true)]
diff --git a/src/Bundle/ChillPersonBundle/migrations/Version20240918151852.php b/src/Bundle/ChillPersonBundle/migrations/Version20240918151852.php
index 27827a86d..d7f37066e 100644
--- a/src/Bundle/ChillPersonBundle/migrations/Version20240918151852.php
+++ b/src/Bundle/ChillPersonBundle/migrations/Version20240918151852.php
@@ -29,7 +29,6 @@ final class Version20240918151852 extends AbstractMigration
         $this->addSql('ALTER TABLE chill_person_accompanying_period_work_referrer ALTER id DROP DEFAULT');
         $this->addSql('ALTER TABLE chill_person_household_composition_type ALTER label SET DEFAULT \'{}\'');
         $this->addSql('ALTER TABLE chill_person_household_composition_type ALTER label SET NOT NULL');
-        $this->addSql('ALTER TABLE chill_person_phone ALTER phonenumber SET NOT NULL');
         $this->addSql('ALTER TABLE chill_person_relationships ALTER createdby_id DROP NOT NULL');
         $this->addSql('ALTER TABLE chill_person_relationships ALTER createdat DROP NOT NULL');
         $this->addSql('ALTER TABLE chill_person_resource ALTER createdby_id DROP NOT NULL');