I am trying to downgrade from ontap 9.4 to ontap 9.1, I managed to get the ontap but when trying to upload and install I get the message below:
Node: ladoga1234-01 Software update started on node ladoga1234-01. Updating image2 with package 91P8_q_image.tgz. Listing package contents. Decompressing package contents. Install Failed. Failed to verify the signatures of the image. The image may have been corrupted. Replace the image, and then try the command again.
Tried to get a new image and checked the communities but couldn't find anything helpful.
I would try to redownload the image as a first step, but more broadly, be sure to read the upgrade/revert guide for 9.1 as there are a lot of caveats about how to go about doing a revert. I would actually recommend opening a case with NetApp and let them work with you through the process. I've never done one but if I ever had to I would definitely open a case.