diff --git a/docsource/modules180-190.rst b/docsource/modules180-190.rst
index e7f797ce076..998d7e667d8 100644
--- a/docsource/modules180-190.rst
+++ b/docsource/modules180-190.rst
@@ -698,7 +698,7 @@ Module coverage 18.0 -> 19.0
 +---------------------------------------------------+----------------------+-------------------------------------------------+
 | link_tracker                                      |                      |No DB layout changes.                            |
 +---------------------------------------------------+----------------------+-------------------------------------------------+
-| loyalty                                           |                      |                                                 |
+| loyalty                                           |Done                  |                                                 |
 +---------------------------------------------------+----------------------+-------------------------------------------------+
 | lunch                                             |                      |                                                 |
 +---------------------------------------------------+----------------------+-------------------------------------------------+
diff --git a/openupgrade_scripts/scripts/loyalty/19.0.1.0/pre-migration.py b/openupgrade_scripts/scripts/loyalty/19.0.1.0/pre-migration.py
new file mode 100644
index 00000000000..3c5e6439bf1
--- /dev/null
+++ b/openupgrade_scripts/scripts/loyalty/19.0.1.0/pre-migration.py
@@ -0,0 +1,18 @@
+from openupgradelib import openupgrade
+
+
+@openupgrade.migrate()
+def migrate(env, version):
+    """Rename the removed ``_get_mail_partner`` helper to ``_get_mail_author``
+    in the stored ``lang`` of these templates, as the 19.0 data-load render
+    aborts before the existing post-migration could clear the field.
+    """
+    openupgrade.logged_query(
+        env.cr,
+        """
+        UPDATE mail_template
+           SET lang = REPLACE(lang, '_get_mail_partner', '_get_mail_author')
+         WHERE model = 'loyalty.card'
+           AND lang LIKE '%%_get_mail_partner%%'
+        """,
+    )