diff --git a/changes/12887.fix.md b/changes/12887.fix.md
new file mode 100644
index 00000000000..382995cb258
--- /dev/null
+++ b/changes/12887.fix.md
@@ -0,0 +1 @@
+Fix the legacy app_configs downgrade failing with a duplicate enum type error
diff --git a/src/ai/backend/manager/models/alembic/versions/84d5c6daf8cc_drop_legacy_app_configs_table.py b/src/ai/backend/manager/models/alembic/versions/84d5c6daf8cc_drop_legacy_app_configs_table.py
index eb8a26fa72e..13e4e665c3a 100644
--- a/src/ai/backend/manager/models/alembic/versions/84d5c6daf8cc_drop_legacy_app_configs_table.py
+++ b/src/ai/backend/manager/models/alembic/versions/84d5c6daf8cc_drop_legacy_app_configs_table.py
@@ -36,7 +36,6 @@ def downgrade() -> None:
     # Recreate the predecessor table to allow `alembic downgrade` to
     # complete cleanly. Existing-row restoration is not attempted.
     app_config_scope_type = sa.Enum("DOMAIN", "PROJECT", "USER", name="app_config_scope_type")
-    app_config_scope_type.create(op.get_bind(), checkfirst=True)
     op.create_table(
         "app_configs",
         IDColumn(),