Just be very careful. This is permanent. The only way to flip the config bytes back is via the I2C interface, which is not accessible in an implant.
Depending on the tag settings you may also have to authenticate with the password first. The default password is FFFFFFFF (not sure if it’s different for the xSIIDs) so the command in NFC Tools raw command section would be:
1BFFFFFFFF,A2E88100F848