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', '08599bf85ca35a42db629ec9ede8f14b', '3.233.221.149', '1582240651', '1582240651', '/shop/popup_content.php?coID=1')

[XT SQL Error]