The problem of overwriting array when pushing

Array push when , The second data will overwrite the first data

let currentData = {
	  oneMonth: this.oneMonth,
	  twoMonth: this.twoMonth,
	  threeMonth: this.threeMonth,
	  fourMonth: this.fourMonth,
	  fiveMonth: this.fiveMonth,
	  sixMonth: this.sixMonth,
	  sevenMonth: this.sevenMonth,
	  eightMonth: this.eightMonth,
	  nineMonth: this.nineMonth,
	  tenMonth: this.tenMonth,
	  elevenMonth: this.elevenMonth,
	  twelveMonth: this.twelveMonth
}
 Wrong writing 
this.list.push( { value: currentData } ) 

 Write it correctly 
this.list.push( { value: JSON.parse(JSON.stringify(currentData )) } )