手機 - F(x)tec Pro1 X - 解決Flashing of userdata is not allowed in snapshotted state問題

參考資料：
https://forum.sailfishos.org/t/flashing-xperia-10iii-fails-what-to-do/11735/2

問題如下：

I: Flashing data/userdata.img
    Sending sparse 'userdata' 1/5 (765895 KB)          OKAY [ 20.291s]
    Writing 'userdata'                                 FAILED (remote: 'Flashing of userdata is not allowed in snapshotted state')
    fastboot: error: Command failed

解法如下：

$ fastboot snapshot-update cancel