diff --git a/app/mix/dao/mongo.go b/app/mix/dao/mongo.go
index a79f85c7..d971fe30 100644
--- a/app/mix/dao/mongo.go
+++ b/app/mix/dao/mongo.go
@@ -6707,9 +6707,7 @@ func (m *Mongo) GetRavenIQTestVisitPV(ctx *gin.Context, req *Raven_IQ_test_visit
 
 	groupClause := bson.D{
 		{Key: "$group", Value: bson.D{
-			{Key: "_id", Value: bson.M{
-				"v_type": "$v_type",
-			}},
+			{Key: "_id", Value: "$v_type"},
 			{Key: "pv", Value: bson.M{
 				"$sum": 1,
 			}},