diff --git a/api/src/main/resources/logback.xml b/api/src/main/resources/logback.xml
deleted file mode 100644
index c1d59f4c..00000000
--- a/api/src/main/resources/logback.xml
+++ /dev/null
@@ -1,3 +0,0 @@
-<configuration>
-    <logger name="reactor.netty" level="OFF"/>
-</configuration>
diff --git a/core/src/main/kotlin/common/exception/Snu4tException.kt b/core/src/main/kotlin/common/exception/Snu4tException.kt
index 4fc7677e..744d0010 100644
--- a/core/src/main/kotlin/common/exception/Snu4tException.kt
+++ b/core/src/main/kotlin/common/exception/Snu4tException.kt
@@ -98,7 +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)
+    ext = mapOf("confirm_message" to confirmMessage),
 )
 
 object CustomLectureResetException : Snu4tException(ErrorType.CANNOT_RESET_CUSTOM_LECTURE)