diff --git a/seminar/testutils.py b/seminar/testutils.py
index e8d7c143..8fe8fe0c 100644
--- a/seminar/testutils.py
+++ b/seminar/testutils.py
@@ -437,7 +437,9 @@ def gen_cisla(rnd, rocniky):
 				verejne_db=True,
 				verejna_vysledkovka=True
 			)
-			node2 = CisloNode.objects.create(cislo = cislo, succ = node, root=rocnik.rocniknode)
+			node2 = CisloNode.objects.get(cislo = cislo)
+			node2.succ = node
+			node2.root = rocnik.rocniknode
 			cislo.save()
 			node = node2
 			if otec: