Occurrence __init__ without event

[iV1n5]

The Occurrence model's init set title and description starting from it's related Event. This is a problem if you try create an empty instance without any initial data. This happen for example while using an AdminInline.

Could you do something for that? If no event is provided, you shouldn't use it.
If you think i'm using the occurrence in the wrong way, can you suggest me how to handle this situation?

Thanks you very much.