diff --git a/AUTHORS b/AUTHORS
index 1094a3fc7..6f04b8771 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -55,6 +55,7 @@ Eduardo Oliveira
 Egor Poderiagin
 Emanuele Palazzetti
 Fazeel Ghafoor
+Febin Micheal Antony
 Federico Dolce
 Florian Demmer
 Frederico Vieira
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4b13db2f0..abb4b8cc8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,6 +23,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 * #1628 Fix inaccurate help_text on client_secret field of Application model
+* #1656 Fix duplicate unique constraint for device_code on Oracle 19c
 
 ## [3.2.0] - 2025-11-13
 ### Added
diff --git a/oauth2_provider/migrations/0013_alter_application_authorization_grant_type_device.py b/oauth2_provider/migrations/0013_alter_application_authorization_grant_type_device.py
index 99769c398..67a7f52b2 100644
--- a/oauth2_provider/migrations/0013_alter_application_authorization_grant_type_device.py
+++ b/oauth2_provider/migrations/0013_alter_application_authorization_grant_type_device.py
@@ -35,7 +35,6 @@ class Migration(migrations.Migration):
             options={
                 'abstract': False,
                 'swappable': 'OAUTH2_PROVIDER_DEVICE_GRANT_MODEL',
-                'constraints': [models.UniqueConstraint(fields=('device_code',), name='oauth2_provider_devicegrant_unique_device_code')],
             },
         ),
     ]
diff --git a/oauth2_provider/models.py b/oauth2_provider/models.py
index 26ec6a6a1..5e9e2e628 100644
--- a/oauth2_provider/models.py
+++ b/oauth2_provider/models.py
@@ -658,12 +658,6 @@ class Meta(AbstractIDToken.Meta):
 class AbstractDeviceGrant(models.Model):
     class Meta:
         abstract = True
-        constraints = [
-            models.UniqueConstraint(
-                fields=["device_code"],
-                name="%(app_label)s_%(class)s_unique_device_code",
-            ),
-        ]
 
     AUTHORIZED = "authorized"
     AUTHORIZATION_PENDING = "authorization-pending"