fix

rowers/models.py

@@ -3779,6 +3779,12 @@ class RowerHRZonesForm(ModelForm):
             hranname = 'AN'
             cleaned_data['hranname'] = 'AN'
 
+        try:
+            hrmaxname = cleaned_data['hrmaxname']
+        except:
+            hrmaxname = 'Max'
+            cleaned_data['hrmaxname'] = 'Max'
+
 
         if rest >= ut2:
             e = "{ut2name} should be higher than {restname}".format(