Why a new score id was occupied by a score from 2016?

[CalCobalt]

A player from our group reported that scores couldn't be submitted. Upon investigating, I discovered that this score ID was already occupied by a score from 2016.

https://osu.ppy.sh/scores/1838864115
(the 2016 score link)

sorry for using translation tool.

[SupDos]

That is likely an internal ID not related at all to score IDs, that score failed to submit due to internet issues (time out)

[bdach]

Close, it's a "score token". But you are correct in saying that treating it as a score ID is incorrect.

[CalCobalt]

thanks for explaining!