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', '48d6f783aa0ce0232c7950a9604424f4', '34.231.247.88', '1653609771', '1653609771', '/shop_content.php/language/de/coID/25/content/Rueckgaberecht')

[XT SQL Error]