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', 'c9ak4ti1tk82maf6lfq3hv6560', '54.80.219.236', '1537301803', '1537301803', '/catalog/default.php?cPath=57&osCsid=o784raee59n7cb4v99gl80tir1')

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