1366 - Incorrect integer value: '' for column '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', '9l9vitesfmot69bjrf0b2sddj0', '54.198.212.30', '1539882488', '1539882488', '/catalog/checkout_confirmation.php?osCsid=ehpggi8ahqktncfs6l9i75b706')

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