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', 'jsntkfc63485rspr84me5cid63', '54.196.5.6', '1534771055', '1534771055', '/catalog/product_info.php?products_id=350&osCsid=dtg2e09ap7uttmb27l80ieses6')

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