diff --git a/addons/stock/migrations/12.0.1.1/post-migration.py b/addons/stock/migrations/12.0.1.1/post-migration.py
index f9621603b17e..eec79b3e3899 100644
--- a/addons/stock/migrations/12.0.1.1/post-migration.py
+++ b/addons/stock/migrations/12.0.1.1/post-migration.py
@@ -2,6 +2,7 @@
 # Copyright 2019 Tecnativa - Pedro M. Baeza
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 from openupgradelib import openupgrade, openupgrade_merge_records
+from psycopg2 import sql
 from psycopg2.extensions import AsIs
 
 
@@ -143,16 +144,29 @@ def fill_stock_package_level(env):
 
 def merge_stock_putaway_product(cr):
     if openupgrade.table_exists(cr, 'stock_product_putaway_strategy'):
-        openupgrade.logged_query(
-            cr, """
-            INSERT INTO stock_fixed_putaway_strat (product_id, putaway_id,
+        column_name = openupgrade.get_legacy_name('old_strat_id')
+        openupgrade.logged_query(cr, sql.SQL(
+            """INSERT INTO stock_fixed_putaway_strat (product_id, putaway_id,
                 fixed_location_id, sequence,
-                create_uid, create_date, write_uid, write_date, %s)
+                create_uid, create_date, write_uid, write_date, {})
             SELECT product_product_id, putaway_id, fixed_location_id, sequence,
                 create_uid, create_date, write_uid, write_date, id
             FROM stock_product_putaway_strategy
-        """, (AsIs(openupgrade.get_legacy_name('old_strat_id')), ),
-        )
+            WHERE product_product_id IS NOT NULL"""
+        ).format(sql.Identifier(column_name)))
+        # We put sequence + 1 for giving more priority by default to product
+        # specific rules
+        openupgrade.logged_query(cr, sql.SQL(
+            """INSERT INTO stock_fixed_putaway_strat (product_id, putaway_id,
+                fixed_location_id, sequence,
+                create_uid, create_date, write_uid, write_date, {})
+            SELECT pp.id, spps.putaway_id, spps.fixed_location_id,
+                spps.sequence + 1, spps.create_uid, spps.create_date,
+                spps.write_uid, spps.write_date, spps.id
+            FROM stock_product_putaway_strategy spps
+            JOIN product_template pt ON pt.id = spps.product_tmpl_id
+            JOIN product_product pp ON pp.product_tmpl_id = pt.id"""
+        ).format(sql.Identifier(column_name)))
 
 
 @openupgrade.migrate()