diff --git a/CommonEventData.go b/CommonEventData.go
index f60d84a..a229ea4 100644
--- a/CommonEventData.go
+++ b/CommonEventData.go
@@ -57,6 +57,7 @@ func EventToMessage(event interface{}) *Message {
 
 			message.ReceiptHandle = commonEventDataMap["ReceiptHandle"].(*string)
 			message.Timestamp = commonEventDataMap["Timestamp"].(int64)
+			message.FormHasChanges = commonEventDataMap["HasChanges"].(bool)
 
 			delete(commonEventDataMap, "ReceiptHandle")
 			delete(commonEventDataMap, "Timestamp")
diff --git a/LessonCreateEvent_test.go b/LessonCreateEvent_test.go
index f98d8bd..88da6a1 100644
--- a/LessonCreateEvent_test.go
+++ b/LessonCreateEvent_test.go
@@ -8,6 +8,7 @@ func TestLessonCreateEvent_ToMessage(t *testing.T) {
 	originalEvent := LessonCreateEvent{
 		CommonEventData: CommonEventData{
 			Timestamp:    1673000000,
+			HasChanges:   true,
 			SessionId:    "00AB0000-0000-0000-0000-000CD0000AA0",
 			LessonId:     "0",
 			DisciplineId: "193000",
diff --git a/LessonDeletedEvent_test.go b/LessonDeletedEvent_test.go
index 0014b5f..c7c0d85 100644
--- a/LessonDeletedEvent_test.go
+++ b/LessonDeletedEvent_test.go
@@ -7,6 +7,7 @@ func TestLessonDeletedEvent_ToMessage(t *testing.T) {
 		originalEvent := LessonDeletedEvent{
 			CommonEventData: CommonEventData{
 				Timestamp:    1673000000,
+				HasChanges:   true,
 				SessionId:    "00AB0000-0000-0000-0000-000CD0000AA0",
 				LessonId:     "999999",
 				DisciplineId: "193000",
diff --git a/LessonEditEvent_test.go b/LessonEditEvent_test.go
index 71a3158..2a69fe6 100644
--- a/LessonEditEvent_test.go
+++ b/LessonEditEvent_test.go
@@ -26,6 +26,7 @@ func TestLessonEditEvent_ToMessage(t *testing.T) {
 		originalEvent := LessonEditEvent{
 			CommonEventData: CommonEventData{
 				Timestamp:    1673000000,
+				HasChanges:   true,
 				SessionId:    "00AB0000-0000-0000-0000-000CD0000AA0",
 				LessonId:     "999999",
 				DisciplineId: "193000",