The following topic has been discussed here (Flame Family 2023.0.1 is now available!) BUT I feel it deserves its own thread so users searching for the magic keywords will find the details here.
The _free timings entries have been removed some times ago BUT were still visible if you had upgraded Flame on a system with legacy init.cfg file (i.e. we carry over the Preview timings). We have removed them in 2023.0.1 BUT you can still change the sync using the Setup application:
-Double Click on the SyncSource field
-The field becomes a drop down with FreeSync, DTVSync and 601Sync Select freesync