diff --git a/internal/proxy/impl.go b/internal/proxy/impl.go
index 708852708395e..f0c4a73f9f0ac 100644
--- a/internal/proxy/impl.go
+++ b/internal/proxy/impl.go
@@ -5334,7 +5334,7 @@ func (node *Proxy) validPrivilegeParams(req *milvuspb.OperatePrivilegeRequest) e
 
 func (node *Proxy) validateOperatePrivilegeV2Params(req *milvuspb.OperatePrivilegeV2Request) error {
 	if req.Role == nil {
-		return fmt.Errorf("the role in the request is nil")
+		return merr.WrapErrParameterInvalidMsg("the role in the request is nil")
 	}
 	if err := ValidateRoleName(req.Role.Name); err != nil {
 		return err
@@ -5342,8 +5342,12 @@ func (node *Proxy) validateOperatePrivilegeV2Params(req *milvuspb.OperatePrivile
 	if err := ValidatePrivilege(req.Grantor.Privilege.Name); err != nil {
 		return err
 	}
+	// validate built-in privilege group params
+	if err := ValidateBuiltInPrivilegeGroup(req.Grantor.Privilege.Name, req.DbName, req.CollectionName); err != nil {
+		return err
+	}
 	if req.Type != milvuspb.OperatePrivilegeType_Grant && req.Type != milvuspb.OperatePrivilegeType_Revoke {
-		return fmt.Errorf("the type in the request not grant or revoke")
+		return merr.WrapErrParameterInvalidMsg("the type in the request not grant or revoke")
 	}
 	if req.DbName != "" && !util.IsAnyWord(req.DbName) {
 		if err := ValidateDatabaseName(req.DbName); err != nil {
diff --git a/internal/proxy/util.go b/internal/proxy/util.go
index a41f8598c1607..ecbc37c62b9b9 100644
--- a/internal/proxy/util.go
+++ b/internal/proxy/util.go
@@ -1113,6 +1113,31 @@ func ValidatePrivilege(entity string) error {
 	return validateName(entity, "Privilege")
 }
 
+func ValidateBuiltInPrivilegeGroup(entity string, dbName string, collectionName string) error {
+	if !util.IsBuiltinPrivilegeGroup(entity) {
+		return nil
+	}
+	switch {
+	case strings.HasPrefix(entity, milvuspb.PrivilegeLevel_Cluster.String()):
+		if !util.IsAnyWord(dbName) || !util.IsAnyWord(collectionName) {
+			return merr.WrapErrParameterInvalidMsg("dbName and collectionName should be * for the cluster level privilege: %s", entity)
+		}
+		return nil
+	case strings.HasPrefix(entity, milvuspb.PrivilegeLevel_Database.String()):
+		if collectionName != "" && collectionName != util.AnyWord {
+			return merr.WrapErrParameterInvalidMsg("collectionName should be * for the database level privilege: %s", entity)
+		}
+		return nil
+	case strings.HasPrefix(entity, milvuspb.PrivilegeLevel_Collection.String()):
+		if util.IsAnyWord(dbName) && !util.IsAnyWord(collectionName) && collectionName != "" {
+			return merr.WrapErrParameterInvalidMsg("please specify database name for the collection level privilege: %s", entity)
+		}
+		return nil
+	default:
+		return nil
+	}
+}
+
 func GetCurUserFromContext(ctx context.Context) (string, error) {
 	return contextutil.GetCurUserFromContext(ctx)
 }
diff --git a/internal/rootcoord/root_coord.go b/internal/rootcoord/root_coord.go
index 4d3c9f93c3592..13bff93517145 100644
--- a/internal/rootcoord/root_coord.go
+++ b/internal/rootcoord/root_coord.go
@@ -22,7 +22,6 @@ import (
 	"math/rand"
 	"os"
 	"strconv"
-	"strings"
 	"sync"
 	"time"
 
@@ -2588,43 +2587,21 @@ func (c *Core) isValidPrivilege(ctx context.Context, privilegeName string, objec
 	return fmt.Errorf("not found the privilege name[%s] in object[%s]", privilegeName, object)
 }
 
-func (c *Core) isValidPrivilegeV2(ctx context.Context, privilegeName, dbName, collectionName string) error {
+func (c *Core) isValidPrivilegeV2(ctx context.Context, privilegeName string) error {
 	if util.IsAnyWord(privilegeName) {
 		return nil
 	}
-	var privilegeLevel string
-	for group, privileges := range util.BuiltinPrivilegeGroups {
-		if privilegeName == group || lo.Contains(privileges, privilegeName) {
-			privilegeLevel = group
-			break
-		}
-	}
-	if privilegeLevel == "" {
-		customPrivGroup, err := c.meta.IsCustomPrivilegeGroup(ctx, privilegeName)
-		if err != nil {
-			return err
-		}
-		if customPrivGroup {
-			return nil
-		}
-		return fmt.Errorf("not found the privilege name[%s] in the custom privilege groups", privilegeName)
+	customPrivGroup, err := c.meta.IsCustomPrivilegeGroup(ctx, privilegeName)
+	if err != nil {
+		return err
 	}
-	switch {
-	case strings.HasPrefix(privilegeLevel, milvuspb.PrivilegeLevel_Cluster.String()):
-		if !util.IsAnyWord(dbName) || !util.IsAnyWord(collectionName) {
-			return fmt.Errorf("dbName and collectionName should be * for the cluster level privilege: %s", privilegeName)
-		}
-		return nil
-	case strings.HasPrefix(privilegeLevel, milvuspb.PrivilegeLevel_Database.String()):
-		if collectionName != "" && collectionName != util.AnyWord {
-			return fmt.Errorf("collectionName should be empty or * for the database level privilege: %s", privilegeName)
-		}
-		return nil
-	case strings.HasPrefix(privilegeLevel, milvuspb.PrivilegeLevel_Collection.String()):
+	if customPrivGroup {
 		return nil
-	default:
+	}
+	if util.IsPrivilegeNameDefined(privilegeName) {
 		return nil
 	}
+	return fmt.Errorf("not found the privilege name[%s]", privilegeName)
 }
 
 // OperatePrivilege operate the privilege, including grant and revoke
@@ -2648,7 +2625,7 @@ func (c *Core) OperatePrivilege(ctx context.Context, in *milvuspb.OperatePrivile
 	privName := in.Entity.Grantor.Privilege.Name
 	switch in.Version {
 	case "v2":
-		if err := c.isValidPrivilegeV2(ctx, privName, in.Entity.DbName, in.Entity.ObjectName); err != nil {
+		if err := c.isValidPrivilegeV2(ctx, privName); err != nil {
 			ctxLog.Error("", zap.Error(err))
 			return merr.StatusWithErrorCode(err, commonpb.ErrorCode_OperatePrivilegeFailure), nil
 		}
diff --git a/tests/integration/rbac/privilege_group_test.go b/tests/integration/rbac/privilege_group_test.go
index 8be1474a4f772..7e44c5301e119 100644
--- a/tests/integration/rbac/privilege_group_test.go
+++ b/tests/integration/rbac/privilege_group_test.go
@@ -179,7 +179,7 @@ func (s *PrivilegeGroupTestSuite) TestGrantV2BuiltinPrivilegeGroup() {
 	resp, _ = s.operatePrivilegeV2(ctx, roleName, "CollectionAdmin", "db1", "col1", milvuspb.OperatePrivilegeType_Grant)
 	s.True(merr.Ok(resp))
 	resp, _ = s.operatePrivilegeV2(ctx, roleName, "CollectionAdmin", util.AnyWord, "col1", milvuspb.OperatePrivilegeType_Grant)
-	s.True(merr.Ok(resp))
+	s.False(merr.Ok(resp))
 }
 
 func (s *PrivilegeGroupTestSuite) TestGrantV2CustomPrivilegeGroup() {