diff --git a/k-tv-backend/migrations_sqlite/20260319000002_add_library_tables.sql b/k-tv-backend/migrations_sqlite/20260319000002_add_library_tables.sql
index 4143c6f..95103a4 100644
--- a/k-tv-backend/migrations_sqlite/20260319000002_add_library_tables.sql
+++ b/k-tv-backend/migrations_sqlite/20260319000002_add_library_tables.sql
@@ -21,6 +21,7 @@ CREATE TABLE IF NOT EXISTS library_items (
 CREATE INDEX IF NOT EXISTS idx_library_items_provider ON library_items(provider_id);
 CREATE INDEX IF NOT EXISTS idx_library_items_content_type ON library_items(content_type);
 CREATE INDEX IF NOT EXISTS idx_library_items_series ON library_items(series_name);
+CREATE UNIQUE INDEX IF NOT EXISTS idx_library_items_provider_external ON library_items(provider_id, external_id);
 
 CREATE TABLE IF NOT EXISTS library_sync_log (
     id           INTEGER PRIMARY KEY AUTOINCREMENT,
@@ -31,3 +32,6 @@ CREATE TABLE IF NOT EXISTS library_sync_log (
     status       TEXT NOT NULL DEFAULT 'running',
     error_msg    TEXT
 );
+
+CREATE INDEX IF NOT EXISTS idx_library_sync_log_provider ON library_sync_log(provider_id);
+CREATE INDEX IF NOT EXISTS idx_library_sync_log_provider_started ON library_sync_log(provider_id, started_at DESC);