diff --git a/business/model/store.go b/business/model/store.go
index 22dce3232..a6020cca4 100644
--- a/business/model/store.go
+++ b/business/model/store.go
@@ -505,7 +505,7 @@ func (*PriceReferSnapshot) TableUnique() [][]string {
 
 func (*PriceReferSnapshot) TableIndex() [][]string {
 	return [][]string{
-		[]string{"SkuID"},
+		[]string{"CityCode", "SnapshotAt", "SkuID"},
 	}
 }