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', 'vi3i5t6m7t35nst7pbgh8pm0t1', '54.80.87.166', '1540040529', '1540040529', '/catalog/checkout_confirmation.php?osCsid=3cti8nelnek7ngb6tr2f2t1g85')

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