May be I have a solution for ps4, Go to PS Store, choose your version of the Game, go to Add ons, choose your add ons, click on load - install. Do it with all your TSW2 content/Add ons . Start the Game and Drive
If you want to end up with unusable software then yes, it is safe to update. If not, for heaven's sake please don't. Sadly I missed it when it did update as I did play MXGP at the same time it automatically updated