[Q]: problem updating to android 5.0.1 topic

HELP android develepers!!
l was trying to update my nexus 5 to android 5.0.1. I downloaded the necessary files and restarted the phone, but it entered the recovery mode and showed an error.
the error said:

verifying current system
”/system/priv-app/luncher2/arm/luncher2.odex" has unexpected contents
E:Error in /cashe/a1a898........438c7.re-signed-hammerhead-LRX22C-from-LRX210.radio-restricted.zip
(status 7)

installation aborted

it looks like the error occurs when checking the current system files...

can you help me solve this problem?

Note: my phone is not rooted and the bootloader is not unlocked. the current version is android 5.0

thanks for help...