diff --git a/memdb.go b/memdb.go
index 944dc12..c1cd4f2 100644
--- a/memdb.go
+++ b/memdb.go
@@ -287,22 +287,7 @@ func (db *memDB) InsertVulnerabilities(osVuls []*common.Vulnerability, appVuls [
 			vv1.FixedIn = append(vv1.FixedIn, v1fx)
 		}
 		cveName := fmt.Sprintf("%s:%s", vv1.Namespace, vv1.Name)
-		if vf, ok := db.osVuls[cveName]; ok {
-			fixes := utils.NewSetFromSliceKind(vf.FixedIn)
-			cpes := utils.NewSetFromSliceKind(vf.CPEs)
-			for _, f := range vv1.FixedIn {
-				if !fixes.Contains(f) {
-					vf.FixedIn = append(vf.FixedIn, f)
-				}
-			}
-			for _, c := range vv1.CPEs {
-				if !cpes.Contains(c) {
-					vf.CPEs = append(vf.CPEs, c)
-				}
-			}
-		} else {
-			db.osVuls[cveName] = vv1
-		}
+		db.osVuls[cveName] = vv1
 	}
 	db.appVuls = appVuls
 
diff --git a/updater/fetchers/rhel2/rhel.go b/updater/fetchers/rhel2/rhel.go
index 712ad49..f2fe233 100644
--- a/updater/fetchers/rhel2/rhel.go
+++ b/updater/fetchers/rhel2/rhel.go
@@ -17,6 +17,7 @@ import (
 	log "github.com/sirupsen/logrus"
 
 	"github.com/vul-dbgen/common"
+	utils "github.com/vul-dbgen/share"
 	"github.com/vul-dbgen/updater"
 )
 
@@ -301,29 +302,24 @@ func makeCveMap(allVulns []common.Vulnerability) map[string]common.Vulnerability
 	for _, vuln := range allVulns {
 		key := fmt.Sprintf("%s:%s", vuln.Namespace, vuln.Name)
 
-		if _, ok := cveMap[key]; !ok {
-			//entry doesn't exist, create it.
+		if exist, ok := cveMap[key]; !ok {
+			// entry doesn't exist, create it.
 			cveMap[key] = vuln
 		} else {
-			//entry exists, check for duplicate feature versions and combine unique feature version lists.
-			for _, fv := range vuln.FixedIn {
-				duplicates := false
-				for _, fv2 := range cveMap[key].FixedIn {
-					if isDuplicateFeatureVersion(fv, fv2) {
-						//feature is already contained, skip and do not add.
-						duplicates = true
-						break
-					}
+			// merge feature version and cpe
+			fixes := utils.NewSetFromSliceKind(exist.FixedIn)
+			cpes := utils.NewSetFromSliceKind(exist.CPEs)
+			for _, f := range vuln.FixedIn {
+				if !fixes.Contains(f) {
+					exist.FixedIn = append(exist.FixedIn, f)
 				}
-				if !duplicates {
-					//Combine feature version lists.
-					newFixedIn := cveMap[key].FixedIn
-					newFixedIn = append(newFixedIn, fv)
-					newEntry := cveMap[key]
-					newEntry.FixedIn = newFixedIn
-					cveMap[key] = newEntry
+			}
+			for _, c := range vuln.CPEs {
+				if !cpes.Contains(c) {
+					exist.CPEs = append(exist.CPEs, c)
 				}
 			}
+			cveMap[key] = exist
 		}
 
 	}