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', 'a2j6do6rch0k159tl14tuifn57', '54.92.160.119', '1539835308', '1539835308', '/catalog/default.php?cPath=56&osCsid=lutlgmfn8r0qkj1eo3g4rm51i6')

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