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', 'kcso4h3fujjkucq9a6uae1b4c7', '54.224.166.141', '1537630866', '1537630866', '/catalog/shopping_cart.php?osCsid=k1hgol21gfbtmfed59tsdmoiq1')

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