I think I found something
In my Contact csv file, the IDsociete attribute refers to the Compagny, so instead of putting Contact.IDsociete, maybe i I have to put Contact.Societe.IDsociete in the Contact csv file?
Doing that i have an internal error, so maybe it's not the right solution to my problem!
Exception changing status of the business space version aware Im server encountered the following error. Error dropping table 'ALTER TABLE' cannot be perfomed on BASTESTDOMAINTEST_CONTACT because it does not exist
I just have change my Contact csv File and the IDsociete name in Societe name and his type to number instead of Societe.