# Can't back-update Legato on WP7700 **URL:** \ **Category:** Uncategorized\ **Created:** [October 16, 2019, 2:31pm UTC](https://forum.legato.io/t/cant-back-update-legato-on-wp7700/4769 "2019-10-16T14:31:47Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![piinst](https://avatars.discourse-cdn.com/v4/letter/p/919ad9/32.png) [@piinst](https://forum.legato.io/u/piinst)\ **Post date:** [October 16, 2019, 2:31pm UTC](https://forum.legato.io/t/cant-back-update-legato-on-wp7700/4769/1 "2019-10-16T14:31:47Z")
Somehow I changed the Legato version on the WP7700 to 19.07.01 and Dev Studio is complaining it’s not supported. From Dev Studio I try to update the device image to WP77 R11 (Legato 18.9.2) but I get the message ‘Upgrade firmware has encountered a problem’, ‘process exited with -1’. ‘legato version’ on the WP7700 still says 19.07.01. I also downloaded WP77xx\_Release11\_SIERRA.spk and used swiflash to update the device image. This completes with SUCCESS but when I do ‘legato version’ on the WP7700 I still get 19.07.01. Has anyone else run into this? Thanks. ---
**Author:** ![shib](https://avatars.discourse-cdn.com/v4/letter/s/f6c823/32.png) [@shib](https://forum.legato.io/u/shib)\ **Post date:** [October 16, 2019, 9:52pm UTC](https://forum.legato.io/t/cant-back-update-legato-on-wp7700/4769/2 "2019-10-16T21:52:06Z")
These might be helpful to you: > [@How do I roll back Legato from 17.6 to 16.10.3?](https://forum.legato.io/t/how-do-i-roll-back-legato-from-17-6-to-16-10-3/2558/2): > > Hi, Luigi, Short Answer After you’ve installed the new firmware image, delete /legato/mntLegatoVersion and reboot. root@swi-mdm9x15:~# rm /legato/mntLegatoVersion root@swi-mdm9x15:~# reboot Or: After you’ve installed the new firmware image, stop Legato, delete everything under /mnt/flash/legato and reboot. root@swi-mdm9x15:~# legato stop Stopping Legato... DONE. root@swi-mdm9x15:~# rm -rf /mnt/flash/legato/\* root@swi-mdm9x15:~# reboot Long Answer Your module (and other Qualcomm 9x15-base… > [@Adding newest version Legato Framework into Developer Studio](https://forum.legato.io/t/adding-newest-version-legato-framework-into-developer-studio/2654/2): > > Hi @lichen First of all, to explain why the latest Legato version available in DS for WP85/WP75 is still 16.10.3, please have a look at the release information for the Legato Framework: [http://legato.io/legato-docs/latest/aboutReleaseInfo.html#releaseInfo\_LegatoAFReleases](http://legato.io/legato-docs/latest/aboutReleaseInfo.html#releaseInfo_LegatoAFReleases) To summarize: DS proposes by default only the packages matching with products official releases, for each supported module. The last release for WP85/75 is still Release 14, embedding Legato 16.10.3 In the meantime, the Leg… ---
**Author:** ![piinst](https://avatars.discourse-cdn.com/v4/letter/p/919ad9/32.png) [@piinst](https://forum.legato.io/u/piinst)\ **Post date:** [October 17, 2019, 1:35pm UTC](https://forum.legato.io/t/cant-back-update-legato-on-wp7700/4769/3 "2019-10-17T13:35:21Z")
Thank you, that works. Will bring the WP7700 back to latest version when VS replaces Dev Studio. 😉