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UPDATE `jos_virtuemart_product_customfields` SET `customfield_value`= `customfield_value` - 1 WHERE `virtuemart_custom_id` = 22 AND `customfield_value` !="0"
#1292 - Truncated incorrect DOUBLE value: ''
This message means you're trying to compare a number and a string in a WHERE clause; either make sure they have similar declarations, or use an explicit CAST to convert the number to a string. If you turn off strict mode, the error should turn into a warning.Jun 30, 2016