Multipurpose sensor false alarm

Hi All,

New to ST. recently bought a home starter kit as set up multipurpose sensors on front and back doors. Set up dogs barking with Sonos. Was awoken at 1:56 am to dogs barking that our back door was opened. Scared the hell out of me as one of the Sonos is in our bedroom.

Found this security error on the Activity Feed.

Ed78608Ca7C2471Cabadcc922Faae210 Is 1451804175959

Anyone know what this is?