diff --git a/webapp/packages/chat-sdk/src/components/ChatMsg/index.tsx b/webapp/packages/chat-sdk/src/components/ChatMsg/index.tsx
index a16fcd6d7..abf2ac8b4 100644
--- a/webapp/packages/chat-sdk/src/components/ChatMsg/index.tsx
+++ b/webapp/packages/chat-sdk/src/components/ChatMsg/index.tsx
@@ -293,7 +293,7 @@ const ChatMsg: React.FC<Props> = ({
       dateInfo: {
         ...chatContext.dateInfo,
         dateMode: dateModeValue,
-        unit: currentDateOption || chatContext.dateInfo.unit,
+        unit: currentDateOption || chatContext.dateInfo?.unit,
       },
       dimensions: [
         ...(chatContext.dimensions || []),
@@ -310,7 +310,7 @@ const ChatMsg: React.FC<Props> = ({
       dateInfo: {
         ...chatContext.dateInfo,
         dateMode: dateModeValue,
-        unit: currentDateOption || chatContext.dateInfo.unit,
+        unit: currentDateOption || chatContext.dateInfo?.unit,
       },
       dimensions: drillDownDimension
         ? [...(chatContext.dimensions || []), drillDownDimension]