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', 'mc6ilv0nl93fbe02b9iaki3sp6', '34.204.194.190', '1569202314', '1569202314', '/shop/')

[XT SQL Error]