only way is back to 893, and use rota893 as posted above. be prepared for a cdt error as this happens to some going back to 893. if you google search bionic pathsaver you will find tons of post with the pathsaver method. what i did was use pathsaver to get back to 893. had to use a file and script to force cdt file. used rota893. booted into recovery and selected the 901 update file.
That should fix any CDT errors you might get, you'll know what this if all your phone does is boot up into the black and white Fastboot screen and won't do anything else.
I can't find a link to P3's One Click Path Saver right now, but I'm uploading it to Rapid Share as we speak and the link to that will be in my signature once it's finished. So if I don't come back here, you'll know where to get it from.