Cron behaviour

Hi all the RZ team,

Just need to understand what’s the server’s cron main jobs are covering in my scheduled queue :
1 – zrdn_every_day_hook | Action : daily_sync() The parameter class is expected to be either a string or an object | Once every day |
2 – zrdn_every_month_hook | Action : none | Once every month
3 – zrdn_every_week_hook | Action : none | Once every week
And why could be this ‘parameter class’ error for the first one and that there is no action for the 2 others…?

May I del these lines if never fired?

Thanks for your help ??
Cheers