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', '80mb1l248db0ecd5dd1hcqn1r7', '54.224.247.42', '1540249873', '1540249873', '/catalog/default.php?cPath=52_187&osCsid=4iuvmru6cgiufe33qdr01vgre1')

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