Try telling the fastboot application what partition to write it to maybe?
https://www.mobileread.com/forums/sh...d.php?t=170929
You really, really are asking for a lot of trouble, trying to run a PW2 with a PW1 system image.
In case you didn't notice, they don't even use the same SoC (cpu) let alone the same hardware.
(Translation: It is a damn good thing you didn't know how to use fastboot.)