I have a problem after upgrading from 3.5.3 to 3.9.1
all the quizes gives this error
×Debug info: Unknown column 'slot.questioncategoryid' in 'field list'
SELECT q.*, qc.contextid, slot.maxmark, slot.id AS slotid, slot.slot, slot.page,
slot.questioncategoryid AS randomfromcategory,
slot.includingsubcategories AS randomincludingsubcategories
FROM mdl_question q
JOIN mdl_question_categories qc ON q.category = qc.id
JOIN mdl_quiz_slots slot ON slot.quizid = ? AND q.id = slot.questionid
ORDER BY slot.slot
[array (
0 => '336',
)]
Error code: dmlreadexception
Any Help Please!!!