5.0.1 Manual installation failure

[Robban Johansson]

Hi!
I havent got the OTA yet so I tried to install the update manually from the recovey.

When I try I get this:

Installing update...
L50QCT.00.001.001
mount: failed to mount /dev/block/platform/msm_sdcc.1/by-name/userdata at /data: Device or resource busy
Verifying current system...
"/system/build.prop" has unexpected contents.
Installation aborted

My current version:
KTU84P.H1

Kernel:
3.4.0-gb1b6fb1

What am I doing wrong?
The phone is a converted M8 to GPe.

 

[Robban Johansson]

The phone is S-OFF, Rooted.

 

[Robban Johansson]

Thread can be deleted.

I just flashed the new RUU instead.