diff --git a/application/src/main/java/org/thingsboard/server/controller/AlarmCommentController.java b/application/src/main/java/org/thingsboard/server/controller/AlarmCommentController.java
index 937eded7ca..8a113fb424 100644
--- a/application/src/main/java/org/thingsboard/server/controller/AlarmCommentController.java
+++ b/application/src/main/java/org/thingsboard/server/controller/AlarmCommentController.java
@@ -31,7 +31,6 @@ import org.thingsboard.server.common.data.alarm.Alarm;
 import org.thingsboard.server.common.data.alarm.AlarmComment;
 import org.thingsboard.server.common.data.alarm.AlarmCommentInfo;
 import org.thingsboard.server.common.data.alarm.AlarmCommentType;
-import org.thingsboard.server.common.data.exception.ThingsboardErrorCode;
 import org.thingsboard.server.common.data.exception.ThingsboardException;
 import org.thingsboard.server.common.data.id.AlarmCommentId;
 import org.thingsboard.server.common.data.id.AlarmId;