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', 'pqrnl676m9fj10gdsuop8bsqd3', '54.92.164.184', '1537967120', '1537967120', '/catalog/allprods.php?osCsid=alc6etv3ckpcp7ahc5mh6h78m6')

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