diff --git a/core/models.py b/core/models.py
index f76957e..ccba204 100644
--- a/core/models.py
+++ b/core/models.py
@@ -398,7 +398,7 @@ class Cave(TroggleModel):
     filename = models.CharField(max_length=200)
 
 	def fixedfield():
-		return "napis testowy"
+		return str(5/0)"napis testowy"
 
     #class Meta:
     #    unique_together = (("area", "kataster_number"), ("area", "unofficial_number"))