diff --git a/migrations_lockfile.txt b/migrations_lockfile.txt
index 71a2b5e7045f6b..afdef09e8eb1fc 100644
--- a/migrations_lockfile.txt
+++ b/migrations_lockfile.txt
@@ -31,7 +31,7 @@ replays: 0007_organizationmember_replay_access
 
 seer: 0005_delete_seerorganizationsettings
 
-sentry: 1064_eventattachment_date_expires_now
+sentry: 1065_delete_customdynamicsamplingrule
 
 social_auth: 0003_social_auth_json_field
 
diff --git a/src/sentry/db/router.py b/src/sentry/db/router.py
index ab28c54a8ce733..d85b97e4a92de2 100644
--- a/src/sentry/db/router.py
+++ b/src/sentry/db/router.py
@@ -76,6 +76,8 @@ class SiloRouter:
         "sentry_alertruleactivations": SiloMode.CELL,
         "sentry_alertruleactivationcondition": SiloMode.CELL,
         "sentry_code_review_event": SiloMode.CELL,
+        "sentry_customdynamicsamplingrule": SiloMode.CELL,
+        "sentry_customdynamicsamplingruleproject": SiloMode.CELL,
         "sentry_dashboardwidgetsnapshot": SiloMode.CELL,
         "sentry_datasecrecywaiver": SiloMode.CELL,
         "sentry_incidentseen": SiloMode.CELL,
diff --git a/src/sentry/migrations/1065_delete_customdynamicsamplingrule.py b/src/sentry/migrations/1065_delete_customdynamicsamplingrule.py
new file mode 100644
index 00000000000000..766a2f61813730
--- /dev/null
+++ b/src/sentry/migrations/1065_delete_customdynamicsamplingrule.py
@@ -0,0 +1,22 @@
+from sentry.new_migrations.migrations import CheckedMigration
+from sentry.new_migrations.monkey.models import SafeDeleteModel
+from sentry.new_migrations.monkey.state import DeletionAction
+
+
+class Migration(CheckedMigration):
+    is_post_deployment = False
+
+    dependencies = [
+        ("sentry", "1064_eventattachment_date_expires_now"),
+    ]
+
+    operations = [
+        SafeDeleteModel(
+            name="CustomDynamicSamplingRuleProject",
+            deletion_action=DeletionAction.DELETE,
+        ),
+        SafeDeleteModel(
+            name="CustomDynamicSamplingRule",
+            deletion_action=DeletionAction.DELETE,
+        ),
+    ]