diff --git a/club/migrations/0010_auto_20170912_2028.py b/club/migrations/0010_auto_20170912_2028.py
index d6e28063..aa49fc4b 100644
--- a/club/migrations/0010_auto_20170912_2028.py
+++ b/club/migrations/0010_auto_20170912_2028.py
@@ -3,19 +3,6 @@ from __future__ import unicode_literals
 import django.db.models.deletion
 from django.db import migrations, models
 
-from club.models import Club
-from core.operations import PsqlRunOnly
-
-
-def generate_club_pages(apps, schema_editor):
-    def recursive_generate_club_page(club):
-        club.make_page()
-        for child in Club.objects.filter(parent=club).all():
-            recursive_generate_club_page(child)
-
-    for club in Club.objects.filter(parent=None).all():
-        recursive_generate_club_page(club)
-
 
 class Migration(migrations.Migration):
     dependencies = [("core", "0024_auto_20170906_1317"), ("club", "0010_club_logo")]
@@ -48,11 +35,4 @@ class Migration(migrations.Migration):
                 null=True,
             ),
         ),
-        PsqlRunOnly(
-            "SET CONSTRAINTS ALL IMMEDIATE", reverse_sql=migrations.RunSQL.noop
-        ),
-        migrations.RunPython(generate_club_pages),
-        PsqlRunOnly(
-            migrations.RunSQL.noop, reverse_sql="SET CONSTRAINTS ALL IMMEDIATE"
-        ),
     ]
diff --git a/counter/migrations/0013_customer_recorded_products.py b/counter/migrations/0013_customer_recorded_products.py
index f2a48ba5..72825d16 100644
--- a/counter/migrations/0013_customer_recorded_products.py
+++ b/counter/migrations/0013_customer_recorded_products.py
@@ -1,38 +1,6 @@
 from __future__ import unicode_literals
 
-from django.conf import settings
 from django.db import migrations, models
-from django.utils.translation import gettext_lazy as _
-
-from core.models import User
-from counter.models import Counter, Customer, Product, Selling
-
-
-def balance_ecocups(apps, schema_editor):
-    for customer in Customer.objects.all():
-        customer.recorded_products = 0
-        for selling in customer.buyings.filter(
-            product__id__in=[settings.SITH_ECOCUP_CONS, settings.SITH_ECOCUP_DECO]
-        ).all():
-            if selling.product.is_record_product:
-                customer.recorded_products += selling.quantity
-            elif selling.product.is_unrecord_product:
-                customer.recorded_products -= selling.quantity
-        if customer.recorded_products < -settings.SITH_ECOCUP_LIMIT:
-            qt = -(customer.recorded_products + settings.SITH_ECOCUP_LIMIT)
-            cons = Product.objects.get(id=settings.SITH_ECOCUP_CONS)
-            Selling(
-                label=_("Ecocup regularization"),
-                product=cons,
-                unit_price=cons.selling_price,
-                club=cons.club,
-                counter=Counter.objects.filter(name="Foyer").first(),
-                quantity=qt,
-                seller=User.objects.get(id=0),
-                customer=customer,
-            ).save(allow_negative=True)
-            customer.recorded_products += qt
-        customer.save()
 
 
 class Migration(migrations.Migration):
@@ -44,5 +12,4 @@ class Migration(migrations.Migration):
             name="recorded_products",
             field=models.IntegerField(verbose_name="recorded items", default=0),
         ),
-        migrations.RunPython(balance_ecocups),
     ]
diff --git a/pedagogy/migrations/0002_auto_20190827_2251.py b/pedagogy/migrations/0002_auto_20190827_2251.py
index 2b1f4b36..7fbe05a8 100644
--- a/pedagogy/migrations/0002_auto_20190827_2251.py
+++ b/pedagogy/migrations/0002_auto_20190827_2251.py
@@ -25,26 +25,11 @@ from __future__ import unicode_literals
 
 from django.db import migrations
 
-from core.models import User
-
-
-def remove_multiples_comments_from_same_user(apps, schema_editor):
-    for user in User.objects.exclude(uv_comments=None).prefetch_related("uv_comments"):
-        for uv in user.uv_comments.values("uv").distinct():
-            last = (
-                user.uv_comments.filter(uv__id=uv["uv"])
-                .order_by("-publish_date")
-                .first()
-            )
-            user.uv_comments.filter(uv__id=uv["uv"]).exclude(pk=last.pk).delete()
-
 
 class Migration(migrations.Migration):
     dependencies = [("pedagogy", "0001_initial")]
 
-    operations = [
-        migrations.RunPython(
-            remove_multiples_comments_from_same_user,
-            reverse_code=migrations.RunPython.noop,
-        )
-    ]
+    # This migration contained just a RunPython operation
+    # Which has since been removed.
+    # The migration itself is kept in order not to break the migration tree
+    operations = []