diff --git a/taiga/projects/history/migrations/0007_set_bloked_note_and_is_blocked_in_snapshots.py b/taiga/projects/history/migrations/0007_set_bloked_note_and_is_blocked_in_snapshots.py
index 8f8f3ed6..dafe32ed 100644
--- a/taiga/projects/history/migrations/0007_set_bloked_note_and_is_blocked_in_snapshots.py
+++ b/taiga/projects/history/migrations/0007_set_bloked_note_and_is_blocked_in_snapshots.py
@@ -8,40 +8,8 @@ from taiga.projects.history.services import (make_key_from_model_object,
     get_pk_from_key)
 
 
-def update_many(objects, fields=[], using="default"):
-    """Update list of Django objects in one SQL query, optionally only
-    overwrite the given fields (as names, e.g. fields=["foo"]).
-    Objects must be of the same Django model. Note that save is not
-    called and signals on the model are not raised."""
-    if not objects:
-        return
-
-    import django.db.models
-    from django.db import connections
-    con = connections[using]
-
-    names = fields
-    meta = objects[0]._meta
-    fields = [f for f in meta.fields if not isinstance(f, django.db.models.AutoField) and (not names or f.name in names)]
-
-    if not fields:
-        raise ValueError("No fields to update, field names are %s." % names)
-
-    fields_with_pk = fields + [meta.pk]
-    parameters = []
-    for o in objects:
-        parameters.append(tuple(f.get_db_prep_save(f.pre_save(o, True), connection=con) for f in fields_with_pk))
-
-    table = meta.db_table
-    assignments = ",".join(("%s=%%s"% con.ops.quote_name(f.column)) for f in fields)
-    con.cursor().executemany(
-        "update %s set %s where %s=%%s" % (table, assignments, con.ops.quote_name(meta.pk.column)),
-        parameters)
-
-
 def set_current_values_of_blocked_note_and_is_blocked_to_the_last_snapshot(apps, schema_editor):
     HistoryEntry = apps.get_model("history", "HistoryEntry")
-    updatingEntries = []
 
     for history_entry in HistoryEntry.objects.filter(is_snapshot=True).order_by("created_at"):
         model = get_model_from_key(history_entry.key)
@@ -59,12 +27,11 @@ def set_current_values_of_blocked_note_and_is_blocked_to_the_last_snapshot(apps,
                 save = True
 
             if save:
-                updatingEntries.append(history_entry)
+                history_entry.save()
 
         except ObjectDoesNotExist as e:
             print("Ignoring {}".format(history_entry.pk))
 
-    update_many(updatingEntries)
 
 class Migration(migrations.Migration):