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', '68q21ki3ad3987hk8uh479cqb7', '54.161.100.24', '1540008178', '1540008178', '/catalog/product_info.php?products_id=779&osCsid=4iuvmru6cgiufe33qdr01vgre1')

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