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', 'tjqui9fu1cmu3kcthv2j6p2970', '54.80.93.19', '1534311651', '1534311651', '/catalog/shopping_cart.php?page=1&osCsid=8253nt4jpdscf136ijbmoo7h54')

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