diff --git a/yuthon_issue/models/inherit_room_booking.py b/yuthon_issue/models/inherit_room_booking.py
index c5f7304aa..2eca85187 100644
--- a/yuthon_issue/models/inherit_room_booking.py
+++ b/yuthon_issue/models/inherit_room_booking.py
@@ -18,14 +18,11 @@ class RoomBooking(models.Model):
         for booking in self:
             if not booking.issue_meeting_line_ids:
                 continue
-            lines = booking.issue_meeting_line_ids.filtered(lambda r: r.sequence).sorted('sequence')
-            if len(lines) < 2:
-                continue
-            for i in range(1, len(lines)):
-                prev_line = lines[i - 1]
-                current_line = lines[i]
-                attendee_ids = prev_line.attendees_ids.ids if prev_line.attendees_ids else []
-                current_line.write({
+            lines = booking.issue_meeting_line_ids
+            first_line = lines[0]
+            attendee_ids = first_line.attendees_ids.ids or []
+            for line in lines[1:]:
+                line.write({
                     'attendees_ids': [(6, 0, attendee_ids)]
                 })