diff --git a/core/src/main/kotlin/common/exception/Snu4tException.kt b/core/src/main/kotlin/common/exception/Snu4tException.kt
index 100e49f4..4fc7677e 100644
--- a/core/src/main/kotlin/common/exception/Snu4tException.kt
+++ b/core/src/main/kotlin/common/exception/Snu4tException.kt
@@ -98,6 +98,7 @@ object WrongSemesterException : Snu4tException(ErrorType.WRONG_SEMESTER)
 class LectureTimeOverlapException(confirmMessage: String) : Snu4tException(
     error = ErrorType.LECTURE_TIME_OVERLAP,
     displayMessage = confirmMessage,
+    ext = mapOf("confirm_message" to confirmMessage)
 )
 
 object CustomLectureResetException : Snu4tException(ErrorType.CANNOT_RESET_CUSTOM_LECTURE)