Django 1.7 - DisallowedModelAdminToField

admin.py

class Inline(admin.TabularInline):
    model = B.items.through


class A_Admin(admin.ModelAdmin):
    inlines = (Inline,)


class B_Admin(admin.ModelAdmin):
    exclude = ('items',)
    inlines = (Inline,)

models.py

class A(models.Model):
    pass
    
 
class B(models.Model):
    items = models.ManyToManyField(A)