diff --git a/packages/memory-service/src/db/schema.js b/packages/memory-service/src/db/schema.js
index b568f2d..ba5d6a0 100644
--- a/packages/memory-service/src/db/schema.js
+++ b/packages/memory-service/src/db/schema.js
@@ -67,8 +67,6 @@ const schema = `
     ON episodes(created_at);
   CREATE INDEX IF NOT EXISTS idx_entities_type 
     ON entities(type);
-  CREATE INDEX IF NOT EXISTS idx_summaries_session 
-    ON summaries(session_id);
 
   CREATE VIRTUAL TABLE IF NOT EXISTS episodes_fts 
     USING fts5(user_message, ai_response, content=episodes, content_rowid=id);