diff --git a/src/lib/ChatSettingsModal.svelte b/src/lib/ChatSettingsModal.svelte
index b35b30f..be98ff9 100644
--- a/src/lib/ChatSettingsModal.svelte
+++ b/src/lib/ChatSettingsModal.svelte
@@ -1,6 +1,6 @@
 <script lang="ts">
   import { applyProfile, getDefaultProfileKey, getProfile, getProfileSelect, newNameForProfile, setSystemPrompt } from './Profiles.svelte'
-  import { getChatDefaults, getChatSettingList, getChatSettingObjectByKey, getExcludeFromProfile } from './Settings.svelte'
+  import { getChatDefaults, getChatSettingList, getChatSettingObjectByKey, getExcludeFromProfile, hasChatSetting } from './Settings.svelte'
   import {
     saveChatStore,
     chatsStorage,
@@ -102,7 +102,7 @@
     // location.protocol + '//' + location.host + location.pathname
     const uri = '#/chat/new?petals=true&' + Object.entries(chatSettings).reduce((a, [k, v]) => {
       const t = typeof v
-      if (t === 'boolean' || t === 'string' || t === 'number') {
+      if (hasChatSetting(k) && (t === 'boolean' || t === 'string' || t === 'number')) {
         a.push(encodeURI(k) + '=' + encodeURI(v as any))
       }
       return a
diff --git a/src/lib/NewChat.svelte b/src/lib/NewChat.svelte
index 0c5877c..2e073df 100644
--- a/src/lib/NewChat.svelte
+++ b/src/lib/NewChat.svelte
@@ -3,14 +3,14 @@
   import { addChat, setChatSettingValueByKey } from './Storage.svelte'
   import { replace } from 'svelte-spa-router'
   import { getProfile, restartProfile } from './Profiles.svelte'
-  import { getChatDefaults } from './Settings.svelte'
+  import { getChatDefaults, hasChatSetting } from './Settings.svelte'
 
   // Create the new chat instance then redirect to it
 
   const urlParams: URLSearchParams = new URLSearchParams($querystring)
   const chatId = urlParams.has('p') ? addChat(getProfile(urlParams.get('p') || '')) : addChat()
   Object.keys(getChatDefaults()).forEach(k => {
-    if (urlParams.has(k)) {
+    if (urlParams.has(k) && hasChatSetting(k as any)) {
       setChatSettingValueByKey(chatId, k as any, urlParams.get(k))
     }
   })
diff --git a/src/lib/Settings.svelte b/src/lib/Settings.svelte
index e00ab9a..85a69ba 100644
--- a/src/lib/Settings.svelte
+++ b/src/lib/Settings.svelte
@@ -36,6 +36,10 @@ export const getRequestSettingList = (): ChatSetting[] => {
       return chatSettingsList.filter(s => s.key in gptDefaults)
 }
 
+export const hasChatSetting = (key: keyof ChatSettings): boolean => {
+      return !!chatSettingLookup[key]
+}
+
 export const getChatSettingObjectByKey = (key: keyof ChatSettings): ChatSetting => {
       const result = chatSettingLookup[key]
       if (!result) console.error(`Chat Setting "${key}" not defined in Settings array.`)