diff --git a/go.mod b/go.mod
index e30b28e..0e6e3d0 100644
--- a/go.mod
+++ b/go.mod
@@ -6,7 +6,7 @@ require (
 	github.com/asaskevich/govalidator v0.0.0-20210307081110-f21760c49a8d
 	github.com/evanphx/json-patch v0.5.2
 	github.com/free5gc/openapi v1.0.6
-	github.com/free5gc/util v1.0.5-0.20230816143033-e726373b7087
+	github.com/free5gc/util v1.0.5-0.20230823103219-e511c4fd20ef
 	github.com/gin-gonic/gin v1.9.0
 	github.com/google/uuid v1.3.0
 	github.com/mitchellh/mapstructure v1.4.3
diff --git a/go.sum b/go.sum
index 816cd7a..bb4bdaa 100644
--- a/go.sum
+++ b/go.sum
@@ -64,8 +64,8 @@ github.com/evanphx/json-patch v0.5.2 h1:xVCHIVMUu1wtM/VkR9jVZ45N3FhZfYMMYGorLCR8
 github.com/evanphx/json-patch v0.5.2/go.mod h1:ZWS5hhDbVDyob71nXKNL0+PWn6ToqBHMikGIFbs31qQ=
 github.com/free5gc/openapi v1.0.6 h1:ytRjU/YZRI8UhKKyfajXSyGB6s1YDFkJ1weeAGJ8LXw=
 github.com/free5gc/openapi v1.0.6/go.mod h1:iw/N0E+FlX44EEx24IBi2EdZW8v+bkj3ETWPGnlK9DI=
-github.com/free5gc/util v1.0.5-0.20230816143033-e726373b7087 h1:gkY/Njn/OWQMITQfZ1q8QjRLN4ElDEQYAQWtV+MpYwc=
-github.com/free5gc/util v1.0.5-0.20230816143033-e726373b7087/go.mod h1:l2Jrml4vojDomW5jdDJhIS60KdbrE9uPYhyAq/7OnF4=
+github.com/free5gc/util v1.0.5-0.20230823103219-e511c4fd20ef h1:ne0EMnst7wbLoaY2Uvn/2Kvp/KkXKMQJcaIJQKFe+a4=
+github.com/free5gc/util v1.0.5-0.20230823103219-e511c4fd20ef/go.mod h1:l2Jrml4vojDomW5jdDJhIS60KdbrE9uPYhyAq/7OnF4=
 github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE=
 github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI=
 github.com/gin-gonic/gin v1.9.0 h1:OjyFBKICoexlu99ctXNR2gg+c5pKrKMuyjgARg9qeY8=
diff --git a/internal/sbi/producer/data_repository.go b/internal/sbi/producer/data_repository.go
index b9b697e..c62f2cb 100644
--- a/internal/sbi/producer/data_repository.go
+++ b/internal/sbi/producer/data_repository.go
@@ -1451,23 +1451,38 @@ func PolicyDataUesUeIdSmDataGetProcedure(collName string, ueId string, snssai mo
 ) (*models.SmPolicyData, *models.ProblemDetails) {
 	filter := bson.M{"ueId": ueId}
 
-	smPolicyData, pd := getDataFromDBWithArg(collName, filter, 2)
+	smPolicyData, pd := getDataFromDBWithArg(collName, filter, mongoapi.COLLATION_STRENGTH_IGNORE_CASE)
 	if pd != nil {
 		return nil, pd
 	}
 
 	hex_snssai := util.SnssaiModelsToHex(snssai)
 	found := false
-	for snssai_str, val := range smPolicyData["smPolicySnssaiData"].(map[string]interface{}) {
-		if strings.EqualFold(snssai_str, hex_snssai) {
-			for _, dnn_map := range val.(map[string]interface{})["smPolicyDnnData"].(map[string]interface{}) {
-				for _, dnn_string := range dnn_map.(map[string]interface{}) {
-					if strings.Compare(dnn_string.(string), util.EscapeDnn(dnn)) == 0 {
-						found = true
-					}
-				}
+	smPolicySnssaiDatas, ok := smPolicyData["smPolicySnssaiData"].(map[string]interface{})
+	if !ok {
+		return nil, util.ProblemDetailsNotFound("DATA_NOT_FOUND")
+	}
+	for snssai, v := range smPolicySnssaiDatas {
+		if !strings.EqualFold(snssai, hex_snssai) {
+			continue
+		}
+		smPolicySnssaiData, ok := v.(map[string]interface{})
+		if !ok {
+			break
+		}
+		smPolicyDnnDatas, ok := smPolicySnssaiData["smPolicyDnnData"].(map[string]interface{})
+		if !ok {
+			break
+		}
+		for dnn := range smPolicyDnnDatas {
+			if strings.EqualFold(dnn, util.EscapeDnn(dnn)) {
+				found = true
+				break
 			}
 		}
+		if found {
+			break
+		}
 	}
 	if !found {
 		return nil, util.ProblemDetailsNotFound("DATA_NOT_FOUND")
@@ -2426,7 +2441,7 @@ func QueryProvisionedDataProcedure(ueId string, servingPlmnId string,
 
 	collName = "subscriptionData.provisionedData.smData"
 	filter = bson.M{"ueId": ueId, "servingPlmnId": servingPlmnId}
-	sessionManagementSubscriptionDatas, err := mongoapi.RestfulAPIGetManyWithArg(collName, filter, 2)
+	sessionManagementSubscriptionDatas, err := mongoapi.RestfulAPIGetManyWithArg(collName, filter, mongoapi.COLLATION_STRENGTH_IGNORE_CASE)
 	if err != nil {
 		logger.DataRepoLog.Errorf("QueryProvisionedDataProcedure get sessionManagementSubscriptionDatas err: %+v", err)
 		return nil, openapi.ProblemDetailsSystemFailure(err.Error())
@@ -2800,7 +2815,7 @@ func QuerySmDataProcedure(collName string, ueId string, servingPlmnId string,
 		filter["dnnConfigurations."+dnnKey] = bson.M{"$exists": true}
 	}
 
-	sessionManagementSubscriptionDatas, err := mongoapi.RestfulAPIGetManyWithArg(collName, filter, 2)
+	sessionManagementSubscriptionDatas, err := mongoapi.RestfulAPIGetManyWithArg(collName, filter, mongoapi.COLLATION_STRENGTH_IGNORE_CASE)
 	if err != nil {
 		logger.DataRepoLog.Errorf("QuerySmDataProcedure err: %+v", err)
 		return nil
@@ -2937,7 +2952,7 @@ func HandleQuerySmfRegList(request *httpwrapper.Request) *httpwrapper.Response {
 
 func QuerySmfRegListProcedure(collName string, ueId string) *[]map[string]interface{} {
 	filter := bson.M{"ueId": ueId}
-	smfRegList, err := mongoapi.RestfulAPIGetManyWithArg(collName, filter, 2)
+	smfRegList, err := mongoapi.RestfulAPIGetManyWithArg(collName, filter, mongoapi.COLLATION_STRENGTH_IGNORE_CASE)
 	if err != nil {
 		logger.DataRepoLog.Errorf("QuerySmfRegListProcedure err: %+v", err)
 		return nil