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', '3186u500sh48bm3rman72udio5', '18.234.88.196', '1558465784', '1558465784', '/lkw_plane_tasche_lkw_plane/product_info.php/info/p158_Tasche-28-20-08-schwarz-hellgr-n-mit-springendem-Frosch.html')

[XT SQL Error]