diff --git a/stock_ux/migrations/18.0.1.5.0/pre-migration.py b/stock_ux/migrations/18.0.1.5.0/pre-migration.py
new file mode 100644
index 000000000..715c7cc11
--- /dev/null
+++ b/stock_ux/migrations/18.0.1.5.0/pre-migration.py
@@ -0,0 +1,30 @@
+<<<<<<< HEAD
+||||||| MERGE BASE
+=======
+# Copyright 2025 ADHOC SA
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+import logging
+
+_logger = logging.getLogger(__name__)
+
+
+def migrate(cr, version):
+    """Create qty_to_order_computed column and warehouse_id index.
+
+    Backport from v19: Adds stored qty_to_order_computed column and
+    warehouse_id index to improve query performance.
+    """
+    # Create qty_to_order_computed column if it doesn't exist
+    cr.execute("""
+        ALTER TABLE stock_warehouse_orderpoint
+        ADD COLUMN IF NOT EXISTS qty_to_order_computed numeric
+    """)
+
+    # Create index on warehouse_id if it doesn't exist
+    cr.execute("""
+        CREATE INDEX IF NOT EXISTS stock_warehouse_orderpoint_warehouse_id_index
+        ON stock_warehouse_orderpoint (warehouse_id)
+    """)
+
+>>>>>>> FORWARD PORTED