do you have any other workaround aside from build the update from scratch?
Nope, your only solution is to redeploy for those customers (unless you have a backup of the old signing keys).
Update Failed Validation
hi,
i messed up my update. months back, i changed my signing keys during a troubleshooting run.
now, all of my clients using this particular application cannot update since the validation failed.
i tried opening the wyc file and use the "Verify Key Matches" to check if it will validate the deployed client file but it failed.
do you have any other workaround aside from build the update from scratch?