diff --git a/supabase/migrations/20251029022310_c73b02c9-5de4-404d-90ce-1b207ed4456a.sql b/supabase/migrations/20251029022310_c73b02c9-5de4-404d-90ce-1b207ed4456a.sql
new file mode 100644
index 00000000..643704e1
--- /dev/null
+++ b/supabase/migrations/20251029022310_c73b02c9-5de4-404d-90ce-1b207ed4456a.sql
@@ -0,0 +1,17 @@
+-- Phase 8: Remove Duplicate Indexes
+-- All duplicate indexes verified as identical via pg_indexes
+
+-- 1. content_submissions: Keep newer lock management index (idx_content_submissions_locks)
+DROP INDEX IF EXISTS public.idx_submissions_assigned;
+
+-- 2. parks: Keep original park_type index (idx_parks_park_type)
+DROP INDEX IF EXISTS public.idx_parks_type;
+
+-- 3. photo_submissions: Keep more descriptive name (idx_photo_submissions_submission_id)
+DROP INDEX IF EXISTS public.idx_photo_submissions_submission;
+
+-- 4. ride_model_technical_specifications: Keep full name (idx_ride_model_technical_specs_search)
+DROP INDEX IF EXISTS public.idx_ride_model_tech_specs_search;
+
+-- 5. ride_technical_specifications: Keep full name (idx_ride_technical_specs_search)
+DROP INDEX IF EXISTS public.idx_ride_tech_specs_search;
\ No newline at end of file