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', 'ta36t0ucsd9amm18cr9uff7lo3', '54.242.25.198', '1560814466', '1560814466', '/shop/')

[XT SQL Error]