diff --git a/stock_inventory_preparation_filter/migrations/13.0.1.0.0/post-migration.py b/stock_inventory_preparation_filter/migrations/13.0.1.0.0/post-migration.py
deleted file mode 100644
index 7061981d9..000000000
--- a/stock_inventory_preparation_filter/migrations/13.0.1.0.0/post-migration.py
+++ /dev/null
@@ -1,40 +0,0 @@
-# Copyright 2020 Tecnativa - Sergio Teruel
-# License LGPL-3.0 or later (https://www.gnu.org/licenses/lgpl).
-
-from openupgradelib import openupgrade
-
-
-def convert_m2o_to_x2m_fields(env):
-    openupgrade.m2o_to_x2m(
-        env.cr,
-        env["stock.inventory"],
-        "stock_inventory",
-        "location_ids",
-        openupgrade.get_legacy_name("location_id"),
-    )
-    openupgrade.m2o_to_x2m(
-        env.cr,
-        env["stock.inventory"],
-        "stock_inventory",
-        "product_ids",
-        openupgrade.get_legacy_name("product_id"),
-    )
-    openupgrade.m2o_to_x2m(
-        env.cr,
-        env["stock.inventory"],
-        "stock_inventory",
-        "categ_ids",
-        openupgrade.get_legacy_name("category_id"),
-    )
-    openupgrade.m2o_to_x2m(
-        env.cr,
-        env["stock.inventory"],
-        "stock_inventory",
-        "lot_ids",
-        openupgrade.get_legacy_name("lot_id"),
-    )
-
-
-@openupgrade.migrate()
-def migrate(env, version):
-    convert_m2o_to_x2m_fields(env)
diff --git a/stock_inventory_preparation_filter/migrations/13.0.1.0.0/pre-migration.py b/stock_inventory_preparation_filter/migrations/13.0.1.0.0/pre-migration.py
deleted file mode 100644
index 0fc810b2c..000000000
--- a/stock_inventory_preparation_filter/migrations/13.0.1.0.0/pre-migration.py
+++ /dev/null
@@ -1,18 +0,0 @@
-# Copyright 2020 Tecnativa - Sergio Teruel
-# License LGPL-3.0 or later (https://www.gnu.org/licenses/lgpl).
-
-from openupgradelib import openupgrade
-
-column_renames = {
-    "stock_inventory": [
-        ("location_id", None),
-        ("product_id", None),
-        ("category_id", None),
-        ("lot_id", None),
-    ]
-}
-
-
-@openupgrade.migrate()
-def migrate(env, version):
-    openupgrade.rename_columns(env.cr, column_renames)