Hi Jon,

Thanks a lot for your answer.

Yes, this issue is the one I'm referring to.
I mentioned it just to illustrate that the update function was supported before, and, from our experience, that is the behavior our users are asking for.

Currently, LabKey does not support updating of existing primary keys. But when bulk-importing data, it reacts differently depending on the case: in one case it appends new records in the other case it reports the error of duplicated PKs (see my previous message).
I think that makes using the bulk-import data function confusing and error-prone for users. Do you plan to revise this feature? Or is there something we are missing?

Regards,
Eva