Duplicates in download

[niconoe]

Hello,

I've recently created the following download: https://www.gbif.org/occurrence/download/0022344-210914110416597.
It appears it contains two duplicate records with GbifID 334518077 (the row content is also identical).

Being a bit surprised, I created an another download with the same predicate a few minutes later, and the issue was not present anymore. Any idea of what happened? This might be problematic if that happens again in the future, since we're building an application that triggers a new download daily and expect GbifIDs to be unique.

thanks!