diff --git a/public/script.js b/public/script.js
index b57dad454..f602a20ac 100644
--- a/public/script.js
+++ b/public/script.js
@@ -173,6 +173,7 @@ import {
     escapeHtml,
     saveBase64AsFile,
     uuidv4,
+    equalsIgnoreCaseAndAccents,
 } from './scripts/utils.js';
 import { debounce_timeout, IGNORE_SYMBOL } from './scripts/constants.js';
 
@@ -9878,6 +9879,15 @@ export async function renameChat(oldFileName, newName) {
         renamed_file: `${newName.trim()}.jsonl`,
     };
 
+    if (body.original_file === body.renamed_file) {
+        console.debug('Chat rename cancelled, old and new names are the same');
+        return;
+    }
+    if (equalsIgnoreCaseAndAccents(body.original_file, body.renamed_file)) {
+        toastr.warning(t`Name not accepted, as it is the same as before (ignoring case and accents).`, t`Rename Chat`);
+        return;
+    }
+
     try {
         showLoader();
         const response = await fetch('/api/chats/rename', {
diff --git a/public/scripts/preset-manager.js b/public/scripts/preset-manager.js
index cdff9501c..5ddd42422 100644
--- a/public/scripts/preset-manager.js
+++ b/public/scripts/preset-manager.js
@@ -36,7 +36,7 @@ import {
     textgenerationwebui_presets,
     textgenerationwebui_settings as textgen_settings,
 } from './textgen-settings.js';
-import { download, parseJsonFile, waitUntilCondition } from './utils.js';
+import { download, equalsIgnoreCaseAndAccents, parseJsonFile, waitUntilCondition } from './utils.js';
 import { t } from './i18n.js';
 import { reasoning_templates } from './reasoning.js';
 
@@ -454,6 +454,9 @@ class PresetManager {
 
     async renamePreset(newName) {
         const oldName = this.getSelectedPresetName();
+        if (equalsIgnoreCaseAndAccents(oldName, newName)) {
+            throw new Error('New name must be different from old name');
+        }
         try {
             await this.savePreset(newName);
             await this.deletePreset(oldName);
@@ -892,6 +895,10 @@ export async function initPresetManager() {
             console.debug(!presetManager.isAdvancedFormatting() ? 'Preset rename cancelled' : 'Template rename cancelled');
             return;
         }
+        if (equalsIgnoreCaseAndAccents(oldName, newName)) {
+            toastr.warning(t`Name not accepted, as it is the same as before (ignoring case and accents).`, t`Rename Preset`);
+            return;
+        }
 
         await presetManager.renamePreset(newName);
 
diff --git a/public/scripts/world-info.js b/public/scripts/world-info.js
index f0382065e..c1ff586a3 100644
--- a/public/scripts/world-info.js
+++ b/public/scripts/world-info.js
@@ -1,7 +1,7 @@
 import { Fuse } from '../lib.js';
 
 import { saveSettings, substituteParams, getRequestHeaders, chat_metadata, this_chid, characters, saveCharacterDebounced, menu_type, eventSource, event_types, getExtensionPromptByName, saveMetadata, getCurrentChatId, extension_prompt_roles } from '../script.js';
-import { download, debounce, initScrollHeight, resetScrollHeight, parseJsonFile, extractDataFromPng, getFileBuffer, getCharaFilename, getSortableDelay, escapeRegex, PAGINATION_TEMPLATE, navigation_option, waitUntilCondition, isTrueBoolean, setValueByPath, flashHighlight, select2ModifyOptions, getSelect2OptionId, dynamicSelect2DataViaAjax, highlightRegex, select2ChoiceClickSubscribe, isFalseBoolean, getSanitizedFilename, checkOverwriteExistingData, getStringHash, parseStringArray, cancelDebounce, findChar, onlyUnique } from './utils.js';
+import { download, debounce, initScrollHeight, resetScrollHeight, parseJsonFile, extractDataFromPng, getFileBuffer, getCharaFilename, getSortableDelay, escapeRegex, PAGINATION_TEMPLATE, navigation_option, waitUntilCondition, isTrueBoolean, setValueByPath, flashHighlight, select2ModifyOptions, getSelect2OptionId, dynamicSelect2DataViaAjax, highlightRegex, select2ChoiceClickSubscribe, isFalseBoolean, getSanitizedFilename, checkOverwriteExistingData, getStringHash, parseStringArray, cancelDebounce, findChar, onlyUnique, equalsIgnoreCaseAndAccents } from './utils.js';
 import { extension_settings, getContext } from './extensions.js';
 import { NOTE_MODULE_NAME, metadata_keys, shouldWIAddPrompt } from './authors-note.js';
 import { isMobile } from './RossAscends-mods.js';
@@ -3586,6 +3586,10 @@ async function renameWorldInfo(name, data) {
         console.debug('World info rename cancelled');
         return;
     }
+    if (equalsIgnoreCaseAndAccents(oldName, newName)) {
+        toastr.warning(t`Name not accepted, as it is the same as before (ignoring case and accents).`, t`Rename World Info`);
+        return;
+    }
 
     const entryPreviouslySelected = selected_world_info.findIndex((e) => e === oldName);