I do have to say that if the sector number being reported is correct, the error/warning is being thrown within the first megabyte of data. At that point I have to wonder if it is solely the media, or if it is an artifact of the drive beginning to read (like maybe it’s still reaching the proper rotational speed for reading or something similar, which is possible and has occasionally caused artifacts with other drives). Maybe a second opinion would confirm or disprove this possibility.
For that matter, sector 262 may just be part of the area containing file system information or the disc structure, and it’s possible this won’t affect anything. (Might just be caused by the way the drive prepares the disc?)
Anyway, did you do these discs at 8x or 16x?