1366 - Incorrect integer value: '' for column `argus_xtc`.`whos_online`.`customer_id` at row 1

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('', 'Guest', 'l58mbqgeoick3gpkhvuk62va74', '18.215.161.19', '1560711083', '1560711083', '/shop/index.php?cat=c244_Computer-und-Notebooks.html')

[XT SQL Error]