diff --git a/apps/backend/src/db/migrations/001_init.sql b/apps/backend/src/db/migrations/001_init.sql
index 7fadbe0c..ea524e5b 100644
--- a/apps/backend/src/db/migrations/001_init.sql
+++ b/apps/backend/src/db/migrations/001_init.sql
@@ -73,6 +73,9 @@ CREATE TABLE IF NOT EXISTS orders (
   UNIQUE(provider, platform, shop_id, platform_order_id)
 );
 
+CREATE INDEX IF NOT EXISTS idx_orders_platform_order_lookup
+  ON orders(provider, platform, platform_order_id, id DESC);
+
 CREATE TABLE IF NOT EXISTS order_items (
   id BIGSERIAL PRIMARY KEY,
   order_id BIGINT NOT NULL REFERENCES orders(id) ON DELETE CASCADE,
diff --git a/apps/backend/src/db/migrations/002_admin_session_version.sql b/apps/backend/src/db/migrations/002_admin_session_version.sql
deleted file mode 100644
index 7b2e0d62..00000000
--- a/apps/backend/src/db/migrations/002_admin_session_version.sql
+++ /dev/null
@@ -1,2 +0,0 @@
-ALTER TABLE admin_users
-  ADD COLUMN IF NOT EXISTS session_version INTEGER NOT NULL DEFAULT 1;
diff --git a/apps/backend/src/db/migrations/003_drop_legacy_fulfillment_rules.sql b/apps/backend/src/db/migrations/003_drop_legacy_fulfillment_rules.sql
deleted file mode 100644
index 536091d1..00000000
--- a/apps/backend/src/db/migrations/003_drop_legacy_fulfillment_rules.sql
+++ /dev/null
@@ -1,2 +0,0 @@
-DROP TABLE IF EXISTS product_match_rules;
-DROP TABLE IF EXISTS sku_fulfillment_bindings;
diff --git a/apps/backend/src/db/migrations/004_order_platform_order_lookup.sql b/apps/backend/src/db/migrations/004_order_platform_order_lookup.sql
deleted file mode 100644
index 0253c90f..00000000
--- a/apps/backend/src/db/migrations/004_order_platform_order_lookup.sql
+++ /dev/null
@@ -1,2 +0,0 @@
-CREATE INDEX IF NOT EXISTS idx_orders_platform_order_lookup
-  ON orders(provider, platform, platform_order_id, id DESC);