I have a Sony Xperia Z Tablet (SGP311) on which I rooted, unlocked and installed XZDual Recovery. I have been trying to install LineageOS on this and kept failing, and realised that TWRP version that came with XZDualRecovery might be a bit too old (2.8.7).
I tried upgrading its version to the latest using various methods (fastboot flash, dd, using the official app, ...) and while some of these methods reported success in flashing, when I get into recovery mode it's always the older version still. Is there something I am doing wrong?
Thanks for your help.