diff --git a/chart/scripts/update_ownership.sql b/chart/scripts/update_ownership.sql
index 1d2b4df..392b899 100644
--- a/chart/scripts/update_ownership.sql
+++ b/chart/scripts/update_ownership.sql
@@ -10,12 +10,12 @@ BEGIN
     WHERE schemaname = 'public'
     LIMIT 1;
 
-    -- Si le propriétaire actuel est différent de erp_role
-    IF current_schema_owner <> 'erp_role' THEN
+    -- Si le propriétaire actuel est différent de {{ .Values.db.ownerRole }}
+    IF current_schema_owner <> '{{ .Values.db.ownerRole }}' THEN
         -- Construire et exécuter la requête REASSIGN OWNED BY
-        EXECUTE format('REASSIGN OWNED BY %I TO %I', current_schema_owner, 'erp_role');
-        RAISE NOTICE 'Ownership of all objects in schema "public" has been reassigned from % to %', current_schema_owner, 'erp_role';
+        EXECUTE format('REASSIGN OWNED BY %I TO %I', current_schema_owner, '{{ .Values.db.ownerRole }}');
+        RAISE NOTICE 'Ownership of all objects in schema "public" has been reassigned from % to %', current_schema_owner, '{{ .Values.db.ownerRole }}';
     ELSE
-        RAISE NOTICE 'No change needed; the owner of schema "public" is already %', 'erp_role';
+        RAISE NOTICE 'No change needed; the owner of schema "public" is already %', '{{ .Values.db.ownerRole }}';
     END IF;
 END $$;
diff --git a/chart/templates/scripts-config.yaml b/chart/templates/scripts-config.yaml
index a02bb11..0eaaeb6 100644
--- a/chart/templates/scripts-config.yaml
+++ b/chart/templates/scripts-config.yaml
@@ -7,4 +7,4 @@ data:
     {{- .Files.Get "scripts/update_conf_db_credentials.sh" | nindent 4 }}
   
   update_table_ownership.sql: |
-    {{- .Files.Get "scripts/update_ownership.sql" | nindent 4 }}
+    {{- tpl (.Files.Get "scripts/update_ownership.sql") . | nindent 4 }}
diff --git a/chart/values-sandbox.yaml b/chart/values-sandbox.yaml
index ce25ddf..8e1647f 100644
--- a/chart/values-sandbox.yaml
+++ b/chart/values-sandbox.yaml
@@ -16,6 +16,7 @@ host:     erp-sandbox.arcodange.lab
 
 db:
   name: erp-sandbox
+  ownerRole: erp_sandbox_role
 
 vault:
   k8sRole:     erp-sandbox
diff --git a/chart/values.yaml b/chart/values.yaml
index 25929d3..7259ff0 100644
--- a/chart/values.yaml
+++ b/chart/values.yaml
@@ -16,6 +16,7 @@ host:     erp.arcodange.lab            # internal hostname for this instance
 
 db:
   name: erp                            # PostgreSQL database name (matches factory tfvars)
+  ownerRole: erp_role                  # Postgres owner role; snake-case <app>_role for prod / <app>_<env>_role for non-prod (matches factory/postgres/iac)
 
 vault:
   k8sRole:     erp                     # VaultAuth role (postgres/iac issues this per instance)