1366 - Incorrect integer value: '' for column `hundgesund`.`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', 'c4cc5b1de2a25cba2f72087bcb97fd89', '3.233.221.149', '1582243417', '1582243417', '/shop/')

[XT SQL Error]