diff --git a/src/models/Analytics.model.js b/src/models/Analytics.model.js
index e420c02d..0284e0dd 100644
--- a/src/models/Analytics.model.js
+++ b/src/models/Analytics.model.js
@@ -72,7 +72,7 @@ const SessionSchema = new mongoose.Schema({
   timestamps: true
 });
 
-SessionSchema.index({ sessionId: 1 });
+// sessionId already indexed via unique: true on line 49
 SessionSchema.index({ visitorId: 1, startTime: -1 });
 SessionSchema.index({ startTime: -1 });