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', 'n52k4tlhufduj46194lc8r8sq7', '54.198.15.20', '1540045802', '1540045802', '/catalog/default.php?cPath=50_135&osCsid=cj96ud5m91vrom51k86kkrn100')

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