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', 'vvbvs2v4jsj1f76b8fj0vb50i0', '54.166.141.69', '1537382259', '1537382259', '/catalog/product_info.php?products_id=839&osCsid=tpd1n7je2ugue4v4h3tr34thp6')

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