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', 'edgmgbd9k1mhp201k7n5dnpvl2', '54.145.83.79', '1539746533', '1539746533', '/catalog/privacy.php?osCsid=idhmg1fj7mcud74cidk40ag3b1')

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