diff --git a/Plugson/src/Core/ventoy_json.h b/Plugson/src/Core/ventoy_json.h
index ad130b97..be2b4341 100644
--- a/Plugson/src/Core/ventoy_json.h
+++ b/Plugson/src/Core/ventoy_json.h
@@ -70,6 +70,7 @@
 #define VTOY_JSON_TOKEN_ERR_RET    "{ \"result\" : \"tokenerror\" }"
 #define VTOY_JSON_EXIST_RET        "{ \"result\" : \"exist\" }"
 #define VTOY_JSON_TIMEOUT_RET      "{ \"result\" : \"timeout\" }"
+#define VTOY_JSON_DUPLICATE        "{ \"result\" : \"duplicate\" }"
 #define VTOY_JSON_BUSY_RET         "{ \"result\" : \"busy\" }"
 #define VTOY_JSON_INUSE_RET        "{ \"result\" : \"inuse\" }"
 #define VTOY_JSON_NOTFOUND_RET     "{ \"result\" : \"notfound\" }"
diff --git a/Plugson/src/Web/ventoy_http.c b/Plugson/src/Web/ventoy_http.c
index 6de2159a..aa1d87d4 100644
--- a/Plugson/src/Web/ventoy_http.c
+++ b/Plugson/src/Web/ventoy_http.c
@@ -918,9 +918,11 @@ static int ventoy_api_theme_add_file(struct mg_connection *conn, VTOY_JSON *json
     int ret;
     int index = 0;
     const char *path = NULL;
+    const char *realpath = NULL;
     path_node *node = NULL;
     path_node *cur = NULL;
     data_theme *data = NULL;
+    char pathbuf[MAX_PATH];
     
     vtoy_json_get_int(json, "index", &index);
     data = g_data_theme + index;
@@ -928,6 +930,19 @@ static int ventoy_api_theme_add_file(struct mg_connection *conn, VTOY_JSON *json
     path = VTOY_JSON_STR_EX("path");
     if (path)
     {
+        realpath = ventoy_real_path(path);
+        scnprintf(pathbuf, sizeof(pathbuf), "%s", realpath);
+    
+        for (node = data->filelist; node; node = node->next)
+        {
+            realpath = ventoy_real_path(node->path);
+            if (strcmp(pathbuf, realpath) == 0)
+            {
+                ventoy_json_result(conn, VTOY_JSON_DUPLICATE);
+                return 0;
+            }
+        }
+    
         node = zalloc(sizeof(path_node));
         if (node)
         {
@@ -980,16 +995,31 @@ static int ventoy_api_theme_add_font(struct mg_connection *conn, VTOY_JSON *json
     int ret;
     int index = 0;
     const char *path = NULL;
+    const char *realpath = NULL;
     path_node *node = NULL;
     path_node *cur = NULL;
     data_theme *data = NULL;
-    
+    char pathbuf[MAX_PATH];
+
     vtoy_json_get_int(json, "index", &index);
     data = g_data_theme + index;
 
     path = VTOY_JSON_STR_EX("path");
     if (path)
     {
+        realpath = ventoy_real_path(path);
+        scnprintf(pathbuf, sizeof(pathbuf), "%s", realpath);
+    
+        for (node = data->fontslist; node; node = node->next)
+        {
+            realpath = ventoy_real_path(node->path);
+            if (strcmp(pathbuf, realpath) == 0)
+            {
+                ventoy_json_result(conn, VTOY_JSON_DUPLICATE);
+                return 0;
+            }
+        }
+        
         node = zalloc(sizeof(path_node));
         if (node)
         {
diff --git a/Plugson/vs/VentoyPlugson/Release/VentoyPlugson.exe b/Plugson/vs/VentoyPlugson/Release/VentoyPlugson.exe
index d0f55609..72ec6e2a 100644
Binary files a/Plugson/vs/VentoyPlugson/Release/VentoyPlugson.exe and b/Plugson/vs/VentoyPlugson/Release/VentoyPlugson.exe differ
diff --git a/Plugson/vs/VentoyPlugson/x64/Release/VentoyPlugson_X64.exe b/Plugson/vs/VentoyPlugson/x64/Release/VentoyPlugson_X64.exe
index 548287f1..043c1b45 100644
Binary files a/Plugson/vs/VentoyPlugson/x64/Release/VentoyPlugson_X64.exe and b/Plugson/vs/VentoyPlugson/x64/Release/VentoyPlugson_X64.exe differ
diff --git a/Plugson/www/index.html b/Plugson/www/index.html
index 02d27c6a..29f909f9 100644
--- a/Plugson/www/index.html
+++ b/Plugson/www/index.html
@@ -757,7 +757,7 @@
 
         <footer class="main-footer">
             <div class="pull-right hidden-xs">
-                <b id="plugson_build_date">20221220 18:30:51</b>
+                <b id="plugson_build_date">20221220 19:41:37</b>
             </div>
             <strong><a href="https://www.ventoy.net" target="_blank">https://www.ventoy.net</a></strong>
         </footer>
@@ -777,10 +777,10 @@
     <script src="/static/js/jQuery-2.1.4.min.js"></script>
     <!-- jquery validate -->
     <script src="/static/js/jquery.validate.min.js"></script>    
-    <script src="/static/js/jquery.validate.vtoymethods.js?v=101"></script>
+    <script src="/static/js/jquery.validate.vtoymethods.js?v=102"></script>
 
-    <script src="/static/js/jquery.vtoy.alert.js?v=101"></script>
-    <script src="/static/js/vtoy.js?v=101"></script>
+    <script src="/static/js/jquery.vtoy.alert.js?v=102"></script>
+    <script src="/static/js/vtoy.js?v=102"></script>
     <script src="/static/js/md5.min.js"></script>
 
     <!-- Bootstrap 3.3.5 -->
diff --git a/Plugson/www/plugson_theme.html b/Plugson/www/plugson_theme.html
index e6f96a02..5c2f6d8e 100644
--- a/Plugson/www/plugson_theme.html
+++ b/Plugson/www/plugson_theme.html
@@ -403,9 +403,13 @@
       index: current_tab_index,
       path: data.path
     }, function(e) {
-      list.push(data);
-      FillThemeFileTable(list, m_data_theme[current_tab_index].default_file);
-      Message.success(g_vtoy_cur_language.STR_SAVE_SUCCESS);
+        if (e.result === 'success') {
+            list.push(data);
+            FillThemeFileTable(list, m_data_theme[current_tab_index].default_file);
+            Message.success(g_vtoy_cur_language.STR_SAVE_SUCCESS);
+        } else if (e.result === 'duplicate') {
+            Message.error(g_vtoy_cur_language.STR_DUPLICATE_PATH);
+        }
     });
   }
 
@@ -428,9 +432,13 @@
       index: current_tab_index,
       path: data.path
     }, function(e) {
-      list.push(data);
-      FillThemeFontTable(list);
-      Message.success(g_vtoy_cur_language.STR_SAVE_SUCCESS);
+        if (e.result === 'success') {
+            list.push(data);
+            FillThemeFontTable(list);
+            Message.success(g_vtoy_cur_language.STR_SAVE_SUCCESS);
+        } else if (e.result === 'duplicate') {
+            Message.error(g_vtoy_cur_language.STR_DUPLICATE_PATH);
+        }
     });
   }