Correção validação do '-'

src/backend/core/admin.py

@@ -39,7 +39,7 @@ class ClienteForm(forms.ModelForm):
         return data
 
     def username_subdomain_name_clean(self, data):
-        if not data.isalnum() and not data.replace('_', '').isalnum() and not data.replace('_', '').isalnum():
+        if not data.isalnum() and not data.replace('_', '').isalnum() and not data.replace('-', '').isalnum():
             raise forms.ValidationError('Somente letras, números, "_" e "-".')
         if data.lower() != data:
             raise forms.ValidationError('Somente letras minúsculas.')