diff --git a/cleanup_fqdn_incoherents.sql b/cleanup_fqdn_incoherents.sql
new file mode 100644
index 0000000..a224328
--- /dev/null
+++ b/cleanup_fqdn_incoherents.sql
@@ -0,0 +1,80 @@
+-- Nettoyage FQDN incohérents avec la convention SANEF
+--   v[r|t|d|v]* → doit être .sanef-rec.fr  (recette/test/dev/qualif)
+--   v[p|l]*    → doit être .sanef.groupe ou .sanef.fr  (prod/legacy)
+-- Les FQDN ne respectant pas la convention sont mis à NULL → _resolve()
+-- recalculera dynamiquement via la cascade ordonnée des suffixes.
+--
+-- Exécutable plusieurs fois sans dommage. Avant/Après pour traçabilité.
+
+\echo '═══ AVANT ═══'
+
+SELECT 'recette_avec_fqdn_prod (à nettoyer)' AS scope, COUNT(*) AS nb
+  FROM servers
+ WHERE LOWER(SUBSTRING(hostname::text, 2, 1)) IN ('r','t','d','v')
+   AND fqdn IS NOT NULL
+   AND (fqdn ILIKE '%.sanef.groupe' OR fqdn ILIKE '%.sanef.fr')
+UNION ALL
+SELECT 'prod_avec_fqdn_recette (à nettoyer)' AS scope, COUNT(*) AS nb
+  FROM servers
+ WHERE LOWER(SUBSTRING(hostname::text, 2, 1)) IN ('p','l')
+   AND fqdn IS NOT NULL
+   AND fqdn ILIKE '%.sanef-rec.fr'
+UNION ALL
+SELECT 'fqdn_total_actuel' AS scope, COUNT(*) AS nb
+  FROM servers WHERE fqdn IS NOT NULL AND fqdn != ''
+UNION ALL
+SELECT 'fqdn_null_actuel' AS scope, COUNT(*) AS nb
+  FROM servers WHERE fqdn IS NULL OR fqdn = '';
+
+\echo '═══ APERÇU 10 LIGNES INCOHÉRENTES ═══'
+
+SELECT hostname, fqdn,
+       CASE WHEN LOWER(SUBSTRING(hostname::text, 2, 1)) IN ('r','t','d','v')
+            THEN 'recette_attendu_sanef-rec.fr'
+            ELSE 'prod_attendu_sanef.groupe' END AS pourquoi
+  FROM servers
+ WHERE fqdn IS NOT NULL
+   AND (
+        (LOWER(SUBSTRING(hostname::text, 2, 1)) IN ('r','t','d','v')
+            AND (fqdn ILIKE '%.sanef.groupe' OR fqdn ILIKE '%.sanef.fr'))
+     OR (LOWER(SUBSTRING(hostname::text, 2, 1)) IN ('p','l')
+            AND fqdn ILIKE '%.sanef-rec.fr')
+       )
+ ORDER BY hostname
+ LIMIT 10;
+
+\echo '═══ NETTOYAGE ═══'
+
+-- Recette/test/dev/qualif : FQDN .sanef.groupe / .sanef.fr → NULL
+UPDATE servers
+   SET fqdn = NULL, updated_at = NOW()
+ WHERE LOWER(SUBSTRING(hostname::text, 2, 1)) IN ('r','t','d','v')
+   AND fqdn IS NOT NULL
+   AND (fqdn ILIKE '%.sanef.groupe' OR fqdn ILIKE '%.sanef.fr');
+
+-- Prod / legacy : FQDN .sanef-rec.fr → NULL
+UPDATE servers
+   SET fqdn = NULL, updated_at = NOW()
+ WHERE LOWER(SUBSTRING(hostname::text, 2, 1)) IN ('p','l')
+   AND fqdn IS NOT NULL
+   AND fqdn ILIKE '%.sanef-rec.fr';
+
+\echo '═══ APRÈS ═══'
+
+SELECT 'recette_avec_fqdn_prod (résiduel)' AS scope, COUNT(*) AS nb
+  FROM servers
+ WHERE LOWER(SUBSTRING(hostname::text, 2, 1)) IN ('r','t','d','v')
+   AND fqdn IS NOT NULL
+   AND (fqdn ILIKE '%.sanef.groupe' OR fqdn ILIKE '%.sanef.fr')
+UNION ALL
+SELECT 'prod_avec_fqdn_recette (résiduel)' AS scope, COUNT(*) AS nb
+  FROM servers
+ WHERE LOWER(SUBSTRING(hostname::text, 2, 1)) IN ('p','l')
+   AND fqdn IS NOT NULL
+   AND fqdn ILIKE '%.sanef-rec.fr'
+UNION ALL
+SELECT 'fqdn_total_apres' AS scope, COUNT(*) AS nb
+  FROM servers WHERE fqdn IS NOT NULL AND fqdn != ''
+UNION ALL
+SELECT 'fqdn_null_apres' AS scope, COUNT(*) AS nb
+  FROM servers WHERE fqdn IS NULL OR fqdn = '';