Don't set last_modified_by if only changing ref to last result
Don't set last_modified_by if only changing ref to last result

guaguadev/redash,pubnative/redash,jmvasquez/redashtest,easytaxibr/redash,EverlyWell/redash,akariv/redash,crowdworks/redash,stefanseifert/redash,pubnative/redash,denisov-vlad/redash,imsally/redash,EverlyWell/redash,pubnative/redash,alexanderlz/redash,stefanseifert/redash,moritz9/redash,guaguadev/redash,vishesh92/redash,pubnative/redash,ninneko/redash,EverlyWell/redash,amino-data/redash,M32Media/redash,rockwotj/redash,getredash/redash,getredash/redash,alexanderlz/redash,EverlyWell/redash,imsally/redash,M32Media/redash,amino-data/redash,ninneko/redash,44px/redash,rockwotj/redash,vishesh92/redash,akariv/redash,akariv/redash,rockwotj/redash,moritz9/redash,hudl/redash,stefanseifert/redash,chriszs/redash,44px/redash,vishesh92/redash,crowdworks/redash,crowdworks/redash,imsally/redash,44px/redash,hudl/redash,rockwotj/redash,easytaxibr/redash,hudl/redash,guaguadev/redash,getredash/redash,pubnative/redash,jmvasquez/redashtest,useabode/redash,guaguadev/redash,moritz9/redash,stefanseifert/redash,44px/redash,ninneko/redash,denisov-vlad/redash,crowdworks/redash,ninneko/redash,chriszs/redash,jmvasquez/redashtest,chriszs/redash,guaguadev/redash,M32Media/redash,jmvasquez/redashtest,vishesh92/redash,stefanseifert/redash,ninneko/redash,getredash/redash,alexanderlz/redash,useabode/redash,alexanderlz/redash,hudl/redash,easytaxibr/redash,denisov-vlad/redash,moritz9/redash,M32Media/redash,denisov-vlad/redash,chriszs/redash,akariv/redash,useabode/redash,akariv/redash,amino-data/redash,jmvasquez/redashtest,easytaxibr/redash,amino-data/redash,easytaxibr/redash,denisov-vlad/redash,getredash/redash,useabode/redash,imsally/redash