diff --git a/backend/alembic/versions/0001_initial.py b/backend/alembic/versions/0001_initial.py
index a764b9a..133d02b 100644
--- a/backend/alembic/versions/0001_initial.py
+++ b/backend/alembic/versions/0001_initial.py
@@ -69,7 +69,7 @@ def upgrade() -> None:
         sa.Column(
             "visibility",
             postgresql.ENUM(
-                "public", "private", "friends_only", name="world_visibility"
+                "public", "private", "friends_only", name="world_visibility", create_type=False
             ),
             nullable=True,
         ),
@@ -89,7 +89,7 @@ def upgrade() -> None:
             "asset_type",
             postgresql.ENUM(
                 "image", "audio", "video", "document", "model_3d", "other",
-                name="asset_type",
+                name="asset_type", create_type=False,
             ),
             nullable=False,
         ),