Data and settings seen in Qlik Management Console (QMC) are stored and managed by the Qlik Repository Service (QRS).
For example custom properties are displayed with their attributes in QMC, including details of the latest modification.
The corresponding data stored in the QRS is as shown in below SQL query result.
The QRS does not log the old and new values, meaning that from auditing point of view the QMC interface or QRS logs can not be used to trace database changes over time.
The QRS acts as a client and executes SQL queries to add, update or delete data in the underlying database. From auditing point of view it would not be accurate to log the data changes on the client side as the data resides on the
database server side. Auditing has not been enabled by default in the underlying PostgreSQL database, which means that data auditing is not possible by default in Qlik Sense.
IMPORTANT: Manual changes to the Qlik Sense PostgreSQL database, such as enabling data auditing, are not supported by Qlik. Product failure, instability or performance caused by manual database changes are not supported by Qlik.