From 1555252c4a60cbf0be96d4725ea25b42e101cdf9 Mon Sep 17 00:00:00 2001
From: G30 <50341825+silentoplayz@users.noreply.github.com>
Date: Thu, 15 Jan 2026 01:43:25 -0500
Subject: [PATCH] fix: handle undefined model in createMessagePair function
 (#20663)

- Add a null check when looking up model to prevent JavaScript error when trying to add a message pair in a chat with an invalid/corrupt model ID.
---
 src/lib/components/chat/Chat.svelte | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/lib/components/chat/Chat.svelte b/src/lib/components/chat/Chat.svelte
index ff41dfe472..d7341257f2 100644
--- a/src/lib/components/chat/Chat.svelte
+++ b/src/lib/components/chat/Chat.svelte
@@ -1282,6 +1282,11 @@
 			const modelId = selectedModels[0];
 			const model = $models.filter((m) => m.id === modelId).at(0);
 
+			if (!model) {
+				toast.error($i18n.t('Model not found'));
+				return;
+			}
+
 			const messages = createMessagesList(history, history.currentId);
 			const parentMessage = messages.length !== 0 ? messages.at(-1) : null;