Read the official Contao announcements.
Contao 3.1.3 is available
by Leo Feyer – Announcements
Contao version 3.1.3 is available. The bugfix release fixes a potentiall data inconsistency issue when using models, which can be caused by the result cache.
The result cache has been removed entirely to fix the issue, which renders the methods
executeCached() deprecated. They only remain available as alias for the
execute() method for reasons of backwards compatibility.