diff --git a/src/pages/pnspsUserGroupDetailPage/index.js b/src/pages/pnspsUserGroupDetailPage/index.js
index fd60e30..fe35c5a 100644
--- a/src/pages/pnspsUserGroupDetailPage/index.js
+++ b/src/pages/pnspsUserGroupDetailPage/index.js
@@ -3,13 +3,14 @@ import {
     Button,
     Grid, Typography, Stack, Box
 } from '@mui/material';
-import { useEffect, useState, lazy } from "react";
+import { useEffect, useState, useRef, lazy } from "react";
 import axios from "axios";
 import { useParams } from "react-router-dom";
 import {
     GeneralConfirmWindow,
     getDeletedRecordWithRefList,
     getIdList,
+    notifyActionError,
     notifyDeleteSuccess,
     notifySaveSuccess
 } from "../../utils/CommonFunction";
@@ -47,7 +48,7 @@ const UserMaintainPage = () => {
     const [editedGroupData, setEditedGroupData] = useState({});
     const [userGroupData, setUserGroupData] = useState([]);
     const [userAuthData, setUserAuthData] = useState([]);
-    const [userConfirm, setUserConfirm] = useState(false);
+    const saveInProgressRef = useRef(false);
     const [groupMember, setGroupMember] = useState([]);
     const [isNewRecord, setIsNewRecord] = useState(false);
     const [deletedUserList, setDeletedUserList] = useState([]);
@@ -92,10 +93,89 @@ const UserMaintainPage = () => {
         setDeletedAuthList(userAuthData.deletedList);
     }
 
-    const submitData = () => {
-        setUserConfirm(true);
+    const submitData = async () => {
+        if (!onReady || saveInProgressRef.current) {
+            return;
+        }
+        saveInProgressRef.current = true;
         setIsCollectData(!isCollectData);
-    }
+
+        try {
+            const isNameValid = await validateGroupName();
+            if (!isNameValid) {
+                return;
+            }
+            const latestGroupFormData = getLatestGroupFormData();
+            const finalDeletedUserList = getDeletedRecordWithRefList(deletedUserList, getIdList(groupMember));
+            const response = await axios.post(POST_AND_UPDATE_USER_GROUP, {
+                id: parseInt(params.id) !== -1 ? parseInt(params.id) : null,
+                name: latestGroupFormData.userGroupName,
+                description: latestGroupFormData.description,
+                addUserIds: getIdList(groupMember),
+                removeUserIds: finalDeletedUserList,
+                addAuthIds: userAuthData,
+                removeAuthIds: deletedAuthList,
+            });
+            if (response.status === 200) {
+                navigate('/usergroupSearchview');
+                notifySaveSuccess();
+            }
+        } catch (error) {
+            console.log(error);
+            notifyActionError(error?.response?.data?.message || "Save failed.");
+        } finally {
+            saveInProgressRef.current = false;
+        }
+    };
+
+    const normalizeName = (name) => (name || "").trim().toLowerCase();
+
+    const getLatestGroupFormData = () => {
+        const nameEl = document.getElementById("groupName");
+        const descEl = document.getElementById("description");
+        // Prefer what the user actually typed. Parent `editedGroupData` can still be stale on the
+        // first Save click (sync runs after `isCollectData` toggles in a child effect).
+        return {
+            userGroupName: nameEl != null ? nameEl.value : (editedGroupData?.userGroupName ?? ""),
+            description: descEl != null ? descEl.value : (editedGroupData?.description ?? "")
+        };
+    };
+
+    const validateGroupName = async () => {
+        const latestGroupFormData = getLatestGroupFormData();
+        const groupName = (latestGroupFormData.userGroupName || "").trim();
+        if (groupName.length === 0) {
+            notifyActionError("User Group Name is required.");
+            return false;
+        }
+
+        try {
+            const response = await axios.get(GET_GROUP_LIST_PATH, {
+                params: {
+                    name: groupName,
+                    start: 0,
+                    limit: 1000
+                }
+            });
+            const records = response?.data?.records || [];
+            const currentId = parseInt(params.id);
+            const isDuplicateName = records.some((record) =>
+                normalizeName(record?.name) === normalizeName(groupName) &&
+                parseInt(record?.id) !== currentId
+            );
+
+            if (isDuplicateName) {
+                notifyActionError(`User Group Name "${groupName}" already exists.`);
+                return false;
+            }
+        } catch (error) {
+            console.log(error);
+            notifyActionError("Unable to validate User Group Name. Please try again.");
+            return false;
+        }
+
+        return true;
+    };
 
     useEffect(() => {
         if (params.id > 0) {
@@ -134,36 +214,6 @@ const UserMaintainPage = () => {
         }
     }, [userGroupData]);
 
-    useEffect(() => {
-        if (userConfirm && onReady) {
-            //avoid delete and add user at the same time
-            let finalDeletedUserList = getDeletedRecordWithRefList(deletedUserList, getIdList(groupMember));
-            // console.log(finalDeletedUserList)
-            axios.post(POST_AND_UPDATE_USER_GROUP,
-                {
-                    "id": parseInt(params.id) !== -1 ? parseInt(params.id) : null,
-                    "name": editedGroupData.userGroupName,
-                    "description": editedGroupData.description,
-                    "addUserIds": getIdList(groupMember),
-                    "removeUserIds": finalDeletedUserList,
-                    "addAuthIds": userAuthData,
-                    "removeAuthIds": deletedAuthList,
-                },
-            )
-                .then((response) => {
-                    if (response.status === 200) {
-                        navigate('/usergroupSearchview');
-                        notifySaveSuccess()
-                    }
-                })
-                .catch(error => {
-                    console.log(error);
-                    return false;
-                });
-        }
-        setUserConfirm(false);
-    }, [editedGroupData, userGroupData, userAuthData]);
-
     return (
         !onReady ?
             <Grid container sx={{ minHeight: '87vh', mb: 3 }} direction="column" justifyContent="center" alignItems="center">