[{"_id":{"$oid":"602a482223df2a16e26f51bc"},"message":"Test Again","pollType":{"$numberInt":"1"},"type":"TEST","optionList":[{"name":"name","original":"https://name/test/pictures/1613383695668-71393-0d1f829222f945dc","thumbnail":"https://name/test/pictures/1613383695668-71393-0d1f829222f945dc","vote":{"$numberInt":"1"},"_id":{"$oid":"602a482223df2a16e26f51b9"},"participateUser":[{"$oid":"5c9baa00bcafa608891b0b44"}],"latestParticipate":[{"$oid":"5c9baa00bcafa608891b0b44"}]},{"name":null,"original":"https://name/test/pictures/1613383695672-71393-e92a34eaf6b48b19","thumbnail":"https://name/test/pictures/1613383695672-71393-e92a34eaf6b48b19","vote":{"$numberInt":"0"},"_id":{"$oid":"602a482223df2a16e26f51ba"},"participateUser":[]},{"name":null,"original":"https://name/test/pictures/1613383695630-71393-3387191491ba279c","thumbnail":"https://name/test/pictures/1613383695630-71393-3387191491ba279c","vote":{"$numberInt":"0"},"_id":{"$oid":"602a482223df2a16e26f51bb"},"participateUser":[]}],"pollId":{"$oid":"602a482223df2a16e26f51b8"},"createdAt":{"$date":{"$numberLong":"1613383714396"}},"updatedAt":{"$date":{"$numberLong":"1613383714396"}},"totalVoteCount":{"$numberInt":"1"},"participateUser":[{"$oid":"5c9baa00bcafa608891b0b44"}]}]

db.collection.update({"optionList.original":{$regex:"https://name/test"}},[{$set:{optionList:{$map:{input:"$optionList",in:{$mergeObjects:["$$this",{thumbnail:{$replaceOne:{input:"$$this.thumbnail",find:"https://name/test",replacement:""}}}]}}}}}])