When uploading multiple badges at the same time, there's a small chance that the server will allocate the same identifier to more than one of them.
We've seen this happen with separate users, though the likelihood of colliding with another user is much lower than the probability of colliding with yourself when using several parallel requests.
To minimize the chance of collision, badges now lock the queue, only allowing one to be uploaded at a time.
When uploading multiple badges at the same time, there's a small chance that the server will allocate the same identifier to more than one of them.
We've seen this happen with separate users, though the likelihood of colliding with another user is much lower than the probability of colliding with yourself when using several parallel requests.
To minimize the chance of collision, badges now lock the queue, only allowing one to be uploaded at a time.