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', '3gut2servdk2kcude5obo5bsf4', '54.161.71.87', '1537366993', '1537366993', '/catalog/allprods.php?osCsid=3cti8nelnek7ngb6tr2f2t1g85')

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