Downgrade ZD 3050 from 10.1 to 9.13?

[james_tyler_joj]

We recently upgraded from 9.12 to 9.13. Then from 9.13, to 10.1, of course failing to realize that the firmware of our APs wouldn't be able to upgrade. Now, APs we're plugging back in are throwing the event "Failed to upgrade [AP NAME] image from 9.12.2.0.219 to 10.1.1.0.42." My question is now - how do I get back down to 9.13? Thank you! 

[troy_ferrell]

We have a ZD3000 i wish to downgrade for the same purpose.  I also have the same model in a separate location on the same network in standby mode.  Do i need to do anythign specific to the standby model to perform the downgrade as well? 

[michael_brado]

To downgrade firmware without losing configuration, you need to have a saved config backup from the version you upgraded from...If you downgrade and don't have a previous backup, you will need to reconfigure your WLANs again (like a new setup)...