                  self.error_messages['invalid'],
                  code='invalid',
                  params={'value': value},
              )
  
      def bound_data(self, data, initial):
          if self.disabled:
              return initial
 
</s> remove             return json.loads(value)
 </s> add             converted = json.loads(value)
        if isinstance(converted, six.text_type):
            return JSONString(converted)
        else:
            return converted
                  self.error_messages['invalid'],
                  code='invalid',
                  params={'value': value},
              )
        if isinstance(converted, six.text_type):
            return JSONString(converted)
        else:
            return converted
  
      def bound_data(self, data, initial):
          if self.disabled:
              return initial
keep keep keep add keep keep keep keep
 Refs #27003 -- Fixed JSONField crash on converted values. 
django/contrib/postgres/forms/jsonb.py