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', '91do896cvp25a1f3jurjddhvj6', '54.92.164.184', '1537966466', '1537966466', '/catalog/shipping.php?osCsid=alre9ndke88b6sga7dmtlca4s7')

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