what does this logstash error mean
"status"=>400, "error"=>{"type"=>"illegal_argument_exception", "reason"=>"Can't merge a non object mapping [batch-upload-usage.costcalculation.elapsed-time] with an object mapping [batch-upload-usage.costcalculation.elapsed-time]"}}}}
this is my logstash filter
mutate {
split => ["batch-upload-usage.costcalculation_4","="]
add_field => {"batch-upload-usage.costcalculation.elapsed-time" =>"%{[batch-upload-usage.costcalculation_4][0]}"}
add_field => {"batch-upload-usage.costcalculation.elapsed-time.value" =>"%{[batch-upload-usage.costcalculation_4][1]}"}
}
How to fix this ?