Проверете целостта на данните
From LimeSurvey Manual
Общо
Функцията Проверка на целостта на данните проверява съгласуваността и излишъка на данните. Може да бъде достъпен от диалоговия прозорец Конфигурация:
Проверка за съгласуваност на данните
It looks for possible errors that might exist between the response tables and survey tables or between the token list and the CPDB, ...
All the values from the screenshot need to meet the consistency standards.
Data redundancy check
If you deactivate a survey, the token tables, the response tables etc., will not be automatically deleted. They will get stored in archived tables. If you do not need them anymore, use the Check data integrity function and select the "leftovers" you wish to delete:
Warning : Please note that you cannot undo the deletion. Once you click on the Delete checked items! button, the data will be gone forever.