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', 'c2oib72fq1otjd8vg4sg2l3qk3', '54.80.140.29', '1534510503', '1534510503', '/catalog/product_info.php?products_id=792&osCsid=dmusui2jk1bmpilsoiujj9v0g2')

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