500 error

Expecting ',' delimiter: line 1 column 783 (char 782)

Traceback (most recent call last):

File "/home/dom2life/dom2life/venv/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 132, in get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/home/dom2life/dom2life/venv/local/lib/python2.7/site-packages/django/views/generic/base.py", line 71, in view
return self.dispatch(request, *args, **kwargs)

File "/home/dom2life/dom2life/venv/local/lib/python2.7/site-packages/django/views/generic/base.py", line 89, in dispatch
return handler(request, *args, **kwargs)

File "/home/dom2life/dom2life/venv/local/lib/python2.7/site-packages/django/utils/decorators.py", line 34, in _wrapper
return bound_func(*args, **kwargs)

File "/home/dom2life/dom2life/venv/local/lib/python2.7/site-packages/django/views/decorators/http.py", line 158, in inner
response = func(request, *args, **kwargs)

File "/home/dom2life/dom2life/venv/local/lib/python2.7/site-packages/django/utils/decorators.py", line 30, in bound_func
return func.__get__(self, type(self))(*args2, **kwargs2)

File "./front/views.py", line 363, in get
return super(ArticleView, self).get(request, *args, **kwargs)

File "/home/dom2life/dom2life/venv/local/lib/python2.7/site-packages/django/views/generic/base.py", line 158, in get
context = self.get_context_data(**kwargs)

File "./front/views.py", line 308, in get_context_data
context['article'] = article.export_front()

File "./front/models.py", line 859, in export_front
filter(article=self)],

File "/home/dom2life/dom2life/venv/local/lib/python2.7/site-packages/django/db/models/query.py", line 162, in __iter__
self._fetch_all()

File "/home/dom2life/dom2life/venv/local/lib/python2.7/site-packages/django/db/models/query.py", line 965, in _fetch_all
self._result_cache = list(self.iterator())

File "/home/dom2life/dom2life/venv/local/lib/python2.7/site-packages/django/db/models/query.py", line 258, in iterator
rel_populator.populate(row, obj)

File "/home/dom2life/dom2life/venv/local/lib/python2.7/site-packages/django/db/models/query.py", line 1769, in populate
obj = self.model_cls.from_db(self.db, self.init_list, obj_data)

File "/home/dom2life/dom2life/venv/local/lib/python2.7/site-packages/django/db/models/base.py", line 489, in from_db
new = cls(*values)

File "/home/dom2life/dom2life/venv/local/lib/python2.7/site-packages/django/db/models/base.py", line 410, in __init__
setattr(self, field.attname, val)

File "/home/dom2life/dom2life/venv/local/lib/python2.7/site-packages/django/db/models/fields/subclassing.py", line 44, in __set__
obj.__dict__[self.field.name] = self.field.to_python(value)

File "./tools/various/fields.py", line 35, in to_python
value = json.loads(value)

File "/usr/lib/python2.7/json/__init__.py", line 338, in loads
return _default_decoder.decode(s)

File "/usr/lib/python2.7/json/decoder.py", line 366, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())

File "/usr/lib/python2.7/json/decoder.py", line 382, in raw_decode
obj, end = self.scan_once(s, idx)

ValueError: Expecting ',' delimiter: line 1 column 783 (char 782)