Unable to delete hosts with special chars

[gardart]

UnicodeEncodeError: 'ascii' codec can't encode character u'\xf6' in position 2: ordinal not in range(128)

Traceback (most recent call last):
File "/usr/lib/python2.7/site-packages/adagios/views.py", line 43, in wrapper
result = view_func(request, *args, **kwargs)
File "/usr/lib/python2.7/site-packages/adagios/objectbrowser/views.py", line 585, in bulk_delete
obj = pynag.Model.string_to_class[i.object_type].objects.get_by_shortname(i.description)
File "/usr/lib/python2.7/site-packages/pynag/Model/init.py", line 476, in get_by_shortname
shortname = str(shortname).strip()
UnicodeEncodeError: 'ascii' codec can't encode character u'\xf6' in position 2: ordinal not in range(128)