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', '23pv06d7va86sht7efaf7fivl2', '54.81.150.27', '1537292446', '1537292446', '/catalog/product_info.php?products_id=431&osCsid=ttkkrugv4r2ekkdcac1a85i286')

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