diff --git a/web_tree_many2one_clickable/migrations/9.0.1.0.0/pre-migration.py b/web_tree_many2one_clickable/migrations/9.0.1.0.0/pre-migration.py
new file mode 100644
index 00000000..3a49bc01
--- /dev/null
+++ b/web_tree_many2one_clickable/migrations/9.0.1.0.0/pre-migration.py
@@ -0,0 +1,30 @@
+# -*- coding: utf-8 -*-
+# Copyright 2016 Pedro M. Baeza <pedro.baeza@tecnativa.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from openupgradelib import openupgrade
+
+
+@openupgrade.migrate(use_env=True)
+def migrate(env, version):
+    """If the system parameter exists before (manually created), don't error
+    on duplicated record inserting manually the XML-ID entry before the
+    loading.
+    """
+    param = env['ir.config_parameter'].search([
+        ('key', '=', 'web_tree_many2one_clickable.default')
+    ])
+    if not param:
+        return
+    try:
+        env.ref('web_tree_many2one_clickable.default')
+        # XML-ID already exists - Nothing to do
+    except ValueError:
+        # Entry doesn't exist - Create it
+        env['ir.model.data'].create({
+            'module': 'web_tree_many2one_clickable',
+            'name': 'default',
+            'model': 'ir.config_parameter',
+            'noupdate': True,
+            'res_id': param.id,
+        })