diff --git a/seminar/migrations/0058_problem_to_uloha_tema_clanek.py b/seminar/migrations/0058_problem_to_uloha_tema_clanek.py
index 5694960c..3c947b24 100644
--- a/seminar/migrations/0058_problem_to_uloha_tema_clanek.py
+++ b/seminar/migrations/0058_problem_to_uloha_tema_clanek.py
@@ -32,13 +32,6 @@ def poskladej_strom(apps, rodic, *texty):
 			tn.succ = textnode
 			tn.save()
 			tn = tn.succ
-def problem_to_polymorphic_Problem(apps,schema_editor):
-	Problem = apps.get_model('seminar', 'Problem')
-	ContentType = apps.get_model('contenttypes', 'ContentType')
-
-	new_ct = ContentType.objects.get_for_model(Problem)
-	Problem.objects.filter(polymorphic_ctype__isnull=True).update(polymorphic_ctype=new_ct)
-
 
 def uloha_to_Uloha(apps,schema_editor):
 	Problem = apps.get_model('seminar', 'Problem')