diff --git a/account_tax_balance/migrations/14.0.1.0.0/pre-migration.py b/account_tax_balance/migrations/14.0.1.0.0/pre-migration.py
deleted file mode 100644
index daddabc3..00000000
--- a/account_tax_balance/migrations/14.0.1.0.0/pre-migration.py
+++ /dev/null
@@ -1,37 +0,0 @@
-# Copyright 2020 Ozono Multimedia S.L.L.
-# Copyright 2021 Simone Rubino - Agile Business Group
-# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
-from openupgradelib import openupgrade
-
-
-@openupgrade.migrate()
-def migrate(env, version):
-    """
-    Column `move_type` of table `account_move` has been renamed to `financial_type`
-    because `move_type` is now used by the core,
-    so the column is moved during migration of module `account` in the core.
-    Enterprise renames it to `move_type_custom`;
-    OpenUpgrade renames it to its legacy name.
-    Move data from the renamed column to the new `financial_type` column.
-    """
-    old_move_type_column = "move_type"
-    new_move_type_column = "financial_type"
-    move_model_name = "account.move"
-    move_table_name = "account_move"
-    enterprise_move_type_rename = "move_type_custom"
-    ou_move_type_rename = openupgrade.get_legacy_name(old_move_type_column)
-
-    for move_type_rename in (enterprise_move_type_rename, ou_move_type_rename):
-        if openupgrade.column_exists(env.cr, move_table_name, move_type_rename):
-            openupgrade.rename_fields(
-                env,
-                [
-                    (
-                        move_model_name,
-                        move_table_name,
-                        move_type_rename,
-                        new_move_type_column,
-                    ),
-                ],
-            )
-            break