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', '63bl0196m1n2ai7j64dih8vtd1', '54.224.150.24', '1540023742', '1540023742', '/catalog/contact_us.php?osCsid=anteppn3ce4o573vsuvr0664b7')

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