X_NOTIFY_PUSH_DEVICE_GONE
Means
the push provider says a device token is dead
Typical cause
APNs answered 410 or FCM answered UNREGISTERED for a device token: the app was uninstalled, or the device rotated its token
Fix
x jobs list --json — nothing to repair: the dead device row is already deleted, and the app stores its new token with its next pushRegister() call