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', 'j60imqlp0jeud93r3pdrnugt33', '54.224.118.247', '1540186466', '1540186466', '/catalog/product_info.php?products_id=600&osCsid=uj7l09po8p0qhagiq3cue7gsn6')

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