What does it mean? Is this correct?

mg@43707:~/.vivocore/sentinel$ cat sentinel-cron.log
Unable to submit: Object creation rate limit exceeded
Unable to submit: Object creation rate limit exceeded
mg@43707:~/.vivocore/sentinel$

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Instead of every minute sentinel running as described in the guide
* * * * * cd /home/YOURUSERNAME/.vivocore/sentinel && ./venv/bin/python bin/sentinel.py 2>&1 >> sentinel-cron.log

I have added sentinel to crontab as described in the guide Step 9) Create a crontab entry to wake sentinel every five minutes:

*/5 * * * * cd /home/YOURUSERNAME/.vivocore/sentinel && ./venv/bin/python bin/sentinel.py 2>&1 >> sentinel-cron.log

Which one is correct: every 5 minutes or every minute?