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', 'uksojlgosk4qhi67mh58a0qbv5', '54.166.203.17', '1537816973', '1537816973', '/catalog/product_info.php?products_id=977&osCsid=ehpggi8ahqktncfs6l9i75b706')

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