diff --git a/migrations/versions/829683efddc4_change_apcvalidationannee.py b/migrations/versions/829683efddc4_change_apcvalidationannee.py
index a2353e69..79152d57 100644
--- a/migrations/versions/829683efddc4_change_apcvalidationannee.py
+++ b/migrations/versions/829683efddc4_change_apcvalidationannee.py
@@ -77,19 +77,17 @@ def upgrade():
         ["id"],
     )
     # Efface les validations d'année dupliquées
-    # (garde le premier code dans l'ordre alphabétique... mieux que rien)
+    # (garde la validation la plus récente)
     session.execute(
         sa.text(
             """
         DELETE FROM apc_validation_annee t1
-        WHERE EXISTS (
-        SELECT 1
-        FROM apc_validation_annee t2
-        WHERE t1.etudid = t2.etudid
+        WHERE t1.id <> (SELECT max(t2.id)
+            FROM apc_validation_annee t2
+            WHERE t1.etudid = t2.etudid
             AND t1.referentiel_competence_id = t2.referentiel_competence_id
             AND t1.ordre = t2.ordre
-            AND t1.code > t2.code
-        );
+        )
         """
         )
     )