Django: Model Validation Error ManytoManyField -

i error while running syncdb

can't seem figure out issue. please help.

    error: 1 or more models did not validate: store.business: reverse query name field 'logo' clashes field 'imagebank.business'. add related_name argument definition 'logo'. 

here models:

class business(models.model):     business_type = models.manytomanyfield(businesstype)     business_service_type = models.manytomanyfield(servicetype)     establishment_type = models.foreignkey(establishmenttype)     logo = models.foreignkey(imagebank, related_name = '%(class)s_logocreated',)     phone = phonenumberfield()     address = models.foreignkey(address)     website = models.urlfield()     name = models.charfield(max_length=64)      def __unicode__(self):         return self.name  class imagebank(models.model):     business = models.foreignkey('business', related_name='%(class)s_business')     image = models.imagefield(upload_to="images/bank")      def url(self):         return self.image.url      def __unicode__(self):         return unicode(self.business) + " : " + unicode(self.image) 

store model:

class store(models.model):     business = models.foreignkey(business,null=true, related_name='business_creator_set')     condition = models.charfield(verbose_name='what customers have do?',max_length = 50)     reward = models.charfield(verbose_name='what customers win?',max_length = 50)     display = models.booleanfield(default=true)     date_created = models.datetimefield(default=datetime.now)       def __unicode__(self):         return self.condition + ", " + self.reward 

try doing this:

... class imagebank(models.model):     business = models.foreignkey('business', related_name='%(class)s_business') .... 

also, if doesn't work, try changing related_name on business.logo field not logo_id. logo_id database uses field , may having conflict.