diff --git a/webapp/packages/chat-sdk/src/components/ChatMsg/index.tsx b/webapp/packages/chat-sdk/src/components/ChatMsg/index.tsx
index 80703544b..e6c9c841b 100644
--- a/webapp/packages/chat-sdk/src/components/ChatMsg/index.tsx
+++ b/webapp/packages/chat-sdk/src/components/ChatMsg/index.tsx
@@ -250,7 +250,7 @@ const ChatMsg: React.FC<Props> = ({
       dateInfo: {
         ...chatContext.dateInfo,
         dateMode: dateModeValue,
-        unit: currentDateOption || chatContext.dateInfo.unit,
+        unit: currentDateOption || chatContext.dateInfo?.unit,
       },
       dimensions: dimension
         ? [...(chatContext.dimensions || []), dimension]