diff --git a/script/database/migrate/process_backup_file.py b/script/database/migrate/process_backup_file.py
new file mode 100644
index 0000000..b6a96e9
--- /dev/null
+++ b/script/database/migrate/process_backup_file.py
@@ -0,0 +1,89 @@
+#!/usr/bin/env python3
+# © 2021-2025 TechnoLibre (http://www.technolibre.ca)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl)
+
+import argparse
+import sys
+import zipfile
+
+
+def process_zip(
+    path_backup_zip, path_output_zip, word_to_delete, file_to_modify
+):
+    # Ouvrir le zip d'entrée en lecture
+    try:
+        with zipfile.ZipFile(path_backup_zip, "r") as zin, zipfile.ZipFile(
+            path_output_zip, "w"
+        ) as zout:
+
+            # Parcourir tous les fichiers du zip
+            for item in zin.infolist():
+                data = zin.read(item.filename)
+                if item.filename == file_to_modify:
+
+                    try:
+                        # On suppose un fichier texte en UTF-8
+                        text = data.decode("utf-8")
+                    except UnicodeDecodeError:
+                        print(
+                            f"Erreur : impossible de décoder {file_to_modify} en UTF-8",
+                            file=sys.stderr,
+                        )
+                        sys.exit(1)
+
+                    # Filtrer les lignes qui NE contiennent PAS le mot à supprimer
+                    lines = text.splitlines(
+                        keepends=True
+                    )  # garder les fins de lignes
+                    filtered_lines = [
+                        line for line in lines if word_to_delete not in line
+                    ]
+                    new_text = "".join(filtered_lines)
+                    new_data = new_text.encode("utf-8")
+
+                    # Écrire la version modifiée dans le nouveau zip
+                    zout.writestr(item, new_data)
+                else:
+                    # Pour les autres fichiers, on recopie tel quel
+                    zout.writestr(item, data)
+
+    except FileNotFoundError:
+        print(
+            f"Erreur : fichier zip source introuvable : {path_backup_zip}",
+            file=sys.stderr,
+        )
+        sys.exit(1)
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="Modifier un fichier dans un zip en supprimant les lignes contenant un mot donné."
+    )
+    parser.add_argument(
+        "--path_backup_zip", help="Chemin vers le zip original"
+    )
+    parser.add_argument(
+        "--path_output_zip", help="Chemin vers le nouveau zip à créer"
+    )
+    parser.add_argument(
+        "--word_to_delete",
+        help="Mot clé à supprimer (lignes contenant ce mot seront retirées)",
+    )
+    parser.add_argument(
+        "--file_to_modify",
+        default="dump.sql",
+        help="Nom du fichier à modifier à l'intérieur du zip (chemin interne)",
+    )
+
+    args = parser.parse_args()
+
+    process_zip(
+        args.path_backup_zip,
+        args.path_output_zip,
+        args.word_to_delete,
+        args.file_to_modify,
+    )
+
+
+if __name__ == "__main__":
+    main()
diff --git a/script/odoo/migration/README.md b/script/odoo/migration/README.md
index a5e395b..105e6e6 100644
--- a/script/odoo/migration/README.md
+++ b/script/odoo/migration/README.md
@@ -3,7 +3,7 @@
 Run this script when doing database migration. Example :
 
 ```bash
-cat ./script/migration/fix_migration_odoo140_to_odoo150.py | ./odoo15.0/odoo/odoo-bin shell -d DATABASE
+source ./.venv.odoo15.0_python3.8.20/bin/activate && cat ./script/migration/fix_migration_odoo140_to_odoo150.py | ./odoo15.0/odoo/odoo-bin shell -d DATABASE
 ```
 
 Check [uninstall_module_list_odoo140_to_odoo150.txt](uninstall_module_list_odoo140_to_odoo150.txt)
diff --git a/script/postgresql/migration/fix_migration_postgresql_17_to_postgresql_18_module_mail_nov_2025.py b/script/postgresql/migration/fix_migration_postgresql_17_to_postgresql_18_module_mail_nov_2025.py
new file mode 100644
index 0000000..10eec3e
--- /dev/null
+++ b/script/postgresql/migration/fix_migration_postgresql_17_to_postgresql_18_module_mail_nov_2025.py
@@ -0,0 +1,27 @@
+#!/usr/bin/env python3
+# © 2021-2025 TechnoLibre (http://www.technolibre.ca)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl)
+
+# This script fix the module mail when migrating postgresql 17 to postgresql 18
+print("Running a script in the Odoo shell!")
+
+# This fix
+# odoo.sql_db: bad query: b'ALTER TABLE "discuss_channel_member" ADD FOREIGN KEY ("channel_id") REFERENCES "discuss_channel"("id") ON DELETE cascade'
+# ERROR: insert or update on table "discuss_channel_member" violates foreign key constraint "discuss_channel_member_channel_id_fkey"
+# DÉTAIL : Key (channel_id)=(3) is not present in table "discuss_channel".
+
+env.cr.execute("""
+    ALTER TABLE discuss_channel
+    DROP CONSTRAINT discuss_channel_channel_type_not_null;
+""")
+env.cr.commit()
+
+#env.cr.execute("SELECT to_regclass('public.discuss_channel');")
+#print("table:", env.cr.fetchone())
+
+#print(
+#    "model discuss.channel:",
+#    env["ir.model"].search([("model", "=", "discuss.channel")]),
+#)
+
+print("End fix migration with update mail postgresql 17 to postgresql 18.")