delete file /etc/apt/sources.list.d/zulu.list
and make sure that you have added the bintray key for the OH2 repo. See more here: openHAB on Linux | openHAB
the azul repos are outdated and you should use these instructions on how to install Zulu: HowTo: Install Zulu Embedded Java on Raspberry Pi 3 - #37 by Benjy
Alternatively, you can install Oracle using apt: HowTo: Install Zulu Embedded Java on Raspberry Pi 3 - #43 by Dim
If I am not wrong, you have now installed the 3rd possibility: OpenJDK which is not the best…
Try to deploy zulu using the manual way