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', 'hfjdvp6gqd30v54hoor2h73jk5', '54.225.26.44', '1539938246', '1539938246', '/catalog/product_info.php?products_id=576&osCsid=1ib7ie6tf319r3je9p9tmoha55')

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