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', '902sanluocjetbfhardm74im41', '54.166.130.157', '1540320704', '1540320704', '/catalog/account.php?osCsid=qcbcnumoscdpfg9uo94a69poh6')

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