diff --git a/tools/import_etat_itop.py b/tools/import_etat_itop.py
index 779253b..5cc831a 100644
--- a/tools/import_etat_itop.py
+++ b/tools/import_etat_itop.py
@@ -78,10 +78,11 @@ def main():
     print(f"[INFO] DB: {DATABASE_URL.split('@')[-1]}")
     conn = engine.connect().execution_options(isolation_level="AUTOCOMMIT")
 
-    # 1. Drop CHECK + migrate legacy values
-    print("[INFO] Drop ancien CHECK...")
+    # 1. Drop CHECK + NOT NULL + migrate legacy values
+    print("[INFO] Drop ancien CHECK + NOT NULL...")
     if not args.dry_run:
         conn.execute(text("ALTER TABLE servers DROP CONSTRAINT IF EXISTS servers_etat_check"))
+        conn.execute(text("ALTER TABLE servers ALTER COLUMN etat DROP NOT NULL"))
 
     print("[INFO] Migration valeurs existantes -> lifecycle iTop ou NULL...")
     for old, new in LEGACY_MAP.items():