huge error.log

I need some help. I have the SuiteCRM 7.4.1 stopped yesterday because out of space on the disk. it turned out that in the Apache log at a rate of 100 entries in the second line was written:
Use of undefined constant acl - assumed ‘acl’ in /var/www/html/sugarcrm/modules/acl_fields/logic_for_subpanelAndDashletsList.php on line 36, referer:
what it means and what I should to do?

Try and run a repair roles, then a repair and rebuild.

Also you can limit the log file size for Apache so that it doesn’t get too big.

Thank you I’ll try it