diff --git a/Plugson/src/Core/ventoy_util.h b/Plugson/src/Core/ventoy_util.h
index 5866c0b8..357dccca 100644
--- a/Plugson/src/Core/ventoy_util.h
+++ b/Plugson/src/Core/ventoy_util.h
@@ -87,6 +87,7 @@ typedef struct SYSINFO
 {
     char buildtime[128];
     int syntax_error;
+    int invalid_config;
         
     int language;
     int pathcase;
diff --git a/Plugson/src/Web/ventoy_http.c b/Plugson/src/Web/ventoy_http.c
index 96a6fa51..be24e375 100644
--- a/Plugson/src/Web/ventoy_http.c
+++ b/Plugson/src/Web/ventoy_http.c
@@ -322,6 +322,9 @@ static int ventoy_api_sysinfo(struct mg_connection *conn, VTOY_JSON *json)
     //read clear
     VTOY_JSON_FMT_SINT("syntax_error", g_sysinfo.syntax_error);
     g_sysinfo.syntax_error = 0;
+    
+    VTOY_JSON_FMT_SINT("invalid_config", g_sysinfo.invalid_config);
+    g_sysinfo.invalid_config = 0;
 
 
     #if defined(_MSC_VER) || defined(WIN32)
@@ -4917,6 +4920,7 @@ static int ventoy_load_old_json(const char *filename)
     unsigned char *start = NULL;
     VTOY_JSON *json = NULL;
     VTOY_JSON *node = NULL;
+    VTOY_JSON *next = NULL;
 
     ret = ventoy_read_file_to_buf(filename, 4, (void **)&buffer, &buflen);
     if (ret)
@@ -4950,6 +4954,18 @@ static int ventoy_load_old_json(const char *filename)
     {
         vlog("parse ventoy.json success\n");
 
+        for (node = json->pstChild; node; node = node->pstNext)
+        for (next = node->pstNext; next; next = next->pstNext)
+        {
+            if (node->pcName && next->pcName && strcmp(node->pcName, next->pcName) == 0)
+            {
+                vlog("ventoy.json contains duplicate key <%s>.\n", node->pcName);
+                g_sysinfo.invalid_config = 1;
+                ret = 1;
+                goto end;
+            }
+        }
+
         for (node = json->pstChild; node; node = node->pstNext)
         {
             ventoy_parse_json(control);
@@ -4975,6 +4991,7 @@ static int ventoy_load_old_json(const char *filename)
         ret = 1;
     }
 
+end:
     vtoy_json_destroy(json);
 
     free(buffer);
diff --git a/Plugson/vs/VentoyPlugson/Release/VentoyPlugson.exe b/Plugson/vs/VentoyPlugson/Release/VentoyPlugson.exe
index 8efd516b..21fcdbac 100644
Binary files a/Plugson/vs/VentoyPlugson/Release/VentoyPlugson.exe and b/Plugson/vs/VentoyPlugson/Release/VentoyPlugson.exe differ
diff --git a/Plugson/www/index.html b/Plugson/www/index.html
index 45731a0c..9037a947 100644
--- a/Plugson/www/index.html
+++ b/Plugson/www/index.html
@@ -723,7 +723,7 @@
 
         <footer class="main-footer">
             <div class="pull-right hidden-xs">
-                <b id="plugson_build_date">20220108 22:41:02</b>
+                <b id="plugson_build_date">20220204 16:31:23</b>
             </div>
             <strong><a href="https://www.ventoy.net" target="_blank">https://www.ventoy.net</a></strong>
         </footer>
@@ -777,6 +777,7 @@
 
     //Main process
     var m_syntax_error;
+    var m_invalid_config;
     callVtoySync({
         method : 'sysinfo'
     }, function(data) {
@@ -784,6 +785,7 @@
         g_current_dir = data.curdir;
         g_current_os = data.os;
         m_syntax_error = data.syntax_error;
+        m_invalid_config = data.invalid_config;
 
         
 
@@ -833,6 +835,14 @@
                 });
                 m_syntax_error = 0;
             }
+            
+            if (m_invalid_config === 1 && typeof(Modal) === 'object') {
+                var title = g_current_language == 'en' ? g_vtoy_cur_language_en.STR_INFO : g_vtoy_cur_language_cn.STR_INFO;
+                var msg = g_current_language == 'en' ? g_vtoy_cur_language_en.STR_INVALID_CONFIG_TIP : g_vtoy_cur_language_cn.STR_INVALID_CONFIG_TIP;
+                Modal.alert({title:title,msg:msg}).on(function(e) {
+                });
+                m_invalid_config = 0;
+            }
 
             setTimeout(function() {
                 ventoy_handshake();
diff --git a/Plugson/www/static/js/vtoy.js b/Plugson/www/static/js/vtoy.js
index cbffd04a..21f71b43 100644
--- a/Plugson/www/static/js/vtoy.js
+++ b/Plugson/www/static/js/vtoy.js
@@ -479,6 +479,7 @@ var g_vtoy_cur_language_en =
     "STR_SECURE_BOOT_ENABLE": "Enable",
     "STR_SECURE_BOOT_DISABLE": "Disable",
     "STR_SYNTAX_ERROR_TIP": "Syntax error detected in ventoy.json, so the configuration is not loaded!",
+    "STR_INVALID_CONFIG_TIP": "Invalid configuration detected in ventoy.json, so the configuration is not loaded!",
 
     "STR_XXX": "xxx"
 };
@@ -613,6 +614,7 @@ var g_vtoy_cur_language_cn =
     "STR_SECURE_BOOT_ENABLE": "开启",
     "STR_SECURE_BOOT_DISABLE": "未开启",
     "STR_SYNTAX_ERROR_TIP": "ventoy.json 文件中存在语法错误，配置未加载!",
+    "STR_INVALID_CONFIG_TIP": "ventoy.json 文件中存在错误配置，配置未加载!",