BTRFS: scrub finds "super" errors - how to fix them?

I've recently had problems with a faulty power supply to a Raspberry PI system used as a media center. Before tracking it and replacing with a new power unit it seems it did some damages to an old disk (that could be troubled by itself) and to a not so old disk that is physically ok. It's formatted with btrfs and scrub gives errors in "super": # btrfs scrub status -d /dev/sda1 scrub status for ************************** scrub device /dev/sda1 (id 1) history scrub resumed at Mon Feb 1 22:55:03 2021 and finished after 01:44:48 total bytes scrubbed: 160.77GiB with 2 errors error details: super=2 corrected errors: 0, uncorrectable errors: 0, unverified errors: 0 btrfs check doesn't find any problem: # btrfs check --progress /dev/sda1 Opening filesystem to check... Checking filesystem on /dev/sda1 UUID: ************************** [1/7] checking root items (0:00:00 elapsed, 36660 items checked) [2/7] checking extents (0:00:26 elapsed, 16745 items checked) [3/7] checking free space cache (0:00:06 elapsed, 240 items checked) [4/7] checking fs roots (0:00:32 elapsed, 684 items checked) [5/7] checking csums (without verifying data) (0:00:29 elapsed, 35432 items checked) [6/7] checking root refs (0:00:00 elapsed, 3 items checked) [7/7] checking quota groups skipped (not enabled on this FS) found 252808790016 bytes used, no error found total csum bytes: 246555120 total tree bytes: 274219008 total fs tree bytes: 11255808 total extent tree bytes: 3080192 btree space waste bytes: 11029386 file data blocks allocated: 252534571008 referenced 252534571008 Now, given that I do have a full backup and an automated script to sync to the media center, so the less troubling thing would be to reformat and populate the disk, I think it's a good context to make some experiment. So: is there any way to attempt a fix? Thanks.