diff --git a/seminar/migrations/0104_hodnoceni_deadline_body.py b/seminar/migrations/0104_hodnoceni_deadline_body.py
index 74992fb8..fe118b60 100644
--- a/seminar/migrations/0104_hodnoceni_deadline_body.py
+++ b/seminar/migrations/0104_hodnoceni_deadline_body.py
@@ -20,8 +20,10 @@ def prirad_deadliny(apps, schema_editor):
             if d is None:
                 d = Deadline.objects.filter(cislo__rocnik=t.rocnik).last()
 
-            h.deadline_body = d
-            h.save()
+            if d is not None:
+                h.deadline_body = d
+                h.save()
+                continue
 
         except Exception:
             pass
@@ -49,9 +51,10 @@ def prirad_deadliny(apps, schema_editor):
             d = Deadline.objects.filter(cislo=cislo, deadline__gte=h.reseni.cas_doruceni).first()
             if d is None:
                 d = Deadline.objects.filter(cislo=cislo).last()
-            h.deadline_body = d
-            h.save()
-            continue
+            if d is not None:
+                h.deadline_body = d
+                h.save()
+                continue
 
         log.warning(f"Deadline hodnocení {h.id} se nepodařil určit exaktnějším způsobem. Zkouším další.")