Does it really? I own both 3.1.4 and 3.2, but will they be ok repairing a FFS of 3.9?
It might do 🤷🏻♂️ Might be worth updating the FFS first to 3.2.2. But as I have mentioned before. Backup the partition first before you try it.
Failing that. Backup the partition data by using Dopus or copy command to another media. Then perhaps try HDToolBox and reseting the partition and re-formatting. Then copy back the data.
I prefer to use PFS3AIO to FFS as it’s quicker and there are plenty of fix tools out there for it.