django admin inline problem

django.py

#models.py

class Gallery(models.Model):
    name = models.CharField("My Gallery", max_length=100)
    
class Photo(models.Model):
    photo = models.ImageField("Photo", upload_to="/some/location/")
    gallery = models.ForeignKey(Gallery)
    
#admin.py

class PhotoInlineOptions(admin.TabularInline)
    model = Photo
    
class GalleryAdminOptions(admin.modelAdmin):
    inlines = [PhotoInlineOptions]
    
 

Problem:
In a gallery instance changeView, when I add a new inline file (Photo) in the inlines, a new Gallery is created when "save and continue" button,
instead of adding new Photo to existing Gallery.

Solved. The problem was a custom save() Gallery method not mentioned in this gist.