Dashboard - WP_DEBUG messages in /wp-content/debug.log

[19-Feb-2016 15:50:36 UTC] WPMU DEV error: Upgrade failed - error 1
[19-Feb-2016 15:50:36 UTC] [WPMU DEV Dashboard Info] Project Auto-Upgrade result for 119: Failed...
[19-Feb-2016 15:50:38 UTC] WPMU DEV error: Upgrade failed - error 1
[19-Feb-2016 15:50:38 UTC] [WPMU DEV Dashboard Info] Project Auto-Upgrade result for 119: Failed...