System Check > File Integrity > piwik-archive.log (never deletes)

I have installed Piwik all ok, but in system check the file integrity always reports to delete “piwik-archive.log”.
Even when I delete this, the next day the file re-generates and the system tells me to delete it. So the cycle repeats.

Did something go wrong during install?
Can you anyone help advise?

This file is generated by your cron tab script documented here: so please update this path so the file is generated outside of your piwik directory