diff --git a/migrations/versions/0001_initial_schema.py b/migrations/versions/0001_initial_schema.py
index 04886db..0f4ec00 100644
--- a/migrations/versions/0001_initial_schema.py
+++ b/migrations/versions/0001_initial_schema.py
@@ -44,6 +44,11 @@ def _timestamps() -> list[sa.Column]:
     ]
 
 
+# create_type=False on every enum below: their CREATE TYPE / DROP TYPE DDL
+# is issued explicitly in upgrade()/downgrade() instead. Without this,
+# SQLAlchemy also tries to auto-create each type as a side effect of the
+# first `op.create_table()` that uses a column of that type, colliding with
+# the explicit `enum_type.create(...)` call and raising DuplicateObject.
 MOVIE_STATUS = postgresql.ENUM(
     "rumored",
     "planned",
@@ -52,6 +57,7 @@ MOVIE_STATUS = postgresql.ENUM(
     "released",
     "canceled",
     name="moviestatus_enum",
+    create_type=False,
 )
 SERIES_STATUS = postgresql.ENUM(
     "planned",
@@ -61,23 +67,29 @@ SERIES_STATUS = postgresql.ENUM(
     "ended",
     "canceled",
     name="seriesstatus_enum",
+    create_type=False,
 )
 ARTWORK_TYPE = postgresql.ENUM(
     "poster", "backdrop", "logo", "profile", "still", "banner", "thumbnail",
     name="artworktype_enum",
+    create_type=False,
 )
 VIDEO_TYPE = postgresql.ENUM(
     "trailer", "teaser", "clip", "featurette", "behind_the_scenes", "interview", "other",
     name="videotype_enum",
+    create_type=False,
 )
 COMPANY_TYPE = postgresql.ENUM(
-    "production_company", "network", "studio", "distributor", name="companytype_enum"
+    "production_company", "network", "studio", "distributor", name="companytype_enum",
+    create_type=False,
 )
 INGESTION_JOB_STATUS = postgresql.ENUM(
-    "pending", "running", "succeeded", "failed", "retrying", name="ingestionjobstatus_enum"
+    "pending", "running", "succeeded", "failed", "retrying", name="ingestionjobstatus_enum",
+    create_type=False,
 )
 MATCH_CONFIDENCE = postgresql.ENUM(
-    "exact", "high", "medium", "low", "ambiguous", "new", name="matchconfidence_enum"
+    "exact", "high", "medium", "low", "ambiguous", "new", name="matchconfidence_enum",
+    create_type=False,
 )