Add migrations/down for knowledgeedges
Add migrations/down for knowledgeedges

ankitbansal82/abot,ankitbansal82/abot,DaleWebb/abot,ankitbansal82/abot,DaleWebb/abot,itsabot/abot,itsabot/abot,DaleWebb/abot,DaleWebb/abot,ankitbansal82/abot,itsabot/abot,itsabot/abot