If I try this with the iode recovery, there is a signature verification error for the package.
On my device (Sony XZ2 Akari), it is not possible to disable recovery update and the iode recovery accepts no unsigned packages 
If I try this with the iode recovery, there is a signature verification error for the package.
On my device (Sony XZ2 Akari), it is not possible to disable recovery update and the iode recovery accepts no unsigned packages