diff --git a/lemarche/users/admin.py b/lemarche/users/admin.py
index 68d221e6f..9f9f71343 100644
--- a/lemarche/users/admin.py
+++ b/lemarche/users/admin.py
@@ -258,7 +258,7 @@ class UserAdmin(FieldsetsInlineMixin, UserAdmin):
                 )
             },
         ),
-        ("API", {"fields": ("api_key", "old_api_keys", "api_key_last_updated")}),
+        ("API", {"fields": ("api_key", "api_key_last_updated")}),
         (
             "Permissions",
             {"classes": ["collapse"], "fields": ("is_active", "is_staff", "is_superuser", "groups")},
diff --git a/lemarche/users/migrations/0040_user_old_api_keys.py b/lemarche/users/migrations/0040_user_old_api_keys.py
deleted file mode 100644
index ae4e39e3f..000000000
--- a/lemarche/users/migrations/0040_user_old_api_keys.py
+++ /dev/null
@@ -1,17 +0,0 @@
-# Generated by Django 4.2.15 on 2024-11-20 14:18
-
-from django.db import migrations, models
-
-
-class Migration(migrations.Migration):
-    dependencies = [
-        ("users", "0039_remove_user_user_email_ci_uniqueness_and_more"),
-    ]
-
-    operations = [
-        migrations.AddField(
-            model_name="user",
-            name="old_api_keys",
-            field=models.JSONField(blank=True, default=list, verbose_name="Anciennes clés API"),
-        ),
-    ]
diff --git a/lemarche/users/models.py b/lemarche/users/models.py
index 61558166d..0213b8658 100644
--- a/lemarche/users/models.py
+++ b/lemarche/users/models.py
@@ -231,7 +231,6 @@ class User(AbstractUser):
     )
 
     api_key = models.CharField(verbose_name="Clé API", max_length=128, unique=True, blank=True, null=True)
-    old_api_keys = models.JSONField(verbose_name="Anciennes clés API", blank=True, default=list)
     api_key_last_updated = models.DateTimeField(
         verbose_name="Date de dernière mise à jour de la clé API", blank=True, null=True
     )
@@ -420,13 +419,11 @@ def update_old_api_keys(sender, instance, **kwargs):
     if instance.pk:  # Check if the user already exists (not a new creation)
         try:
             old_instance = sender.objects.get(pk=instance.pk)
-            if old_instance.api_key != instance.api_key and old_instance.api_key:
+            if old_instance.api_key != instance.api_key:
                 # Add the old key to the list of old keys
-                if instance.old_api_keys is None:
-                    instance.old_api_keys = list()
-                instance.old_api_keys.append(old_instance.api_key)
+                instance.api_key_last_updated = timezone.now()
         except sender.DoesNotExist:
-            pass  # The user does not exist yet
+            instance.api_key_last_updated = timezone.now()
 
 
 @receiver(post_save, sender=User)