diff --git a/server/vbv_lernwelt/dashboard/graphql/types/attendance.py b/server/vbv_lernwelt/dashboard/graphql/types/attendance.py
index d6bb1e22..3f7488ae 100644
--- a/server/vbv_lernwelt/dashboard/graphql/types/attendance.py
+++ b/server/vbv_lernwelt/dashboard/graphql/types/attendance.py
@@ -52,15 +52,21 @@ def attendance_day_presences(
 
         url = f"/course/{course_session.course.slug}/cockpit/attendance?id={attendance_day.learning_content.id}&courseSessionId={course_session.id}"
 
-        participants_total = CourseSessionUser.objects.filter(
-            course_session=course_session, role=CourseSessionUser.Role.MEMBER
-        ).count()
-
+        participant_user_ids = [
+            str(user_id)
+            for user_id in CourseSessionUser.objects.filter(
+                course_session=course_session, role=CourseSessionUser.Role.MEMBER
+            ).values_list("user_id", flat=True)
+        ]
+        participants_total = len(participant_user_ids)
         participants_present = len(
             [
                 participant
                 for participant in attendance_day.attendance_user_list
                 if participant["status"] == AttendanceUserStatus.PRESENT.value
+                # in the `attendance_user_list` are users present, which are not
+                # (anymore) in the course session -> so we need to filter them out
+                and participant["user_id"] in participant_user_ids
             ]
         )