1366 - Incorrect integer value: '' for column `mapshopatlogis`.`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', '1e056c4ccd0f239faf63c5d6fc2fb9b3', '216.73.216.121', '1751757576', '1751757576', '/index.php/language/en/cat/c32_Welt.html')

[XT SQL Error]