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', '7grkkcocd6b00avujq66s2fct0', '54.196.26.1', '1539621618', '1539621618', '/catalog/create_account.php?osCsid=dmusui2jk1bmpilsoiujj9v0g2')

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