Class with id 131 doesn't exist.
Query:
SELECT `Field_ID` as `id`,
`Field_Name` as `name`,
`TypeOfData_ID` as `type`,
`Format` as `format`,
`Description` AS `description`,
`NotNull` AS `not_null`,
`DefaultState` as `default`,
`TypeOfEdit_ID` AS `edit_type`,
IF(`TypeOfData_ID` IN (4, 10),
SUBSTRING_INDEX(`Format`, ':', 1),
'') AS `table`,
`DoSearch` AS `search`
FROM `Field`
WHERE `Checked` = 1 AND `Class_ID` = '131'
ORDER BY `Priority`
Error:
MySQL server has gone away