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If I upload images in two places on a page but I think their keys are different, how can I separate them without conflict? My current approach is to create two files

var uploader1= Qiniu.uploader({
'Key': function(up, file) {
            var now = new Date();
            var date = now.getFullYear()+((now.getMonth()+1)<10?"0":"")+(now.getMonth()+1)+(now.getDate()<10?"0":"")+now.getDate();
            return "topic/cover/"+date;
        },
})
var uploader2= Qiniu.uploader({
    'Key': function(up, file) {
            var now = new Date();
            var date = now.getFullYear()+((now.getMonth()+1)<10?"0":"")+(now.getMonth()+1)+(now.getDate()<10?"0":"")+now.getDate();
            return "topic/banner/"+date;
        },
    })
})

But why will the keys be the same if we do this?