diff --git a/src/hooks/usePolygon.js b/src/hooks/usePolygon.js
index a1cbc4f0..2ae37440 100644
--- a/src/hooks/usePolygon.js
+++ b/src/hooks/usePolygon.js
@@ -852,7 +852,10 @@ export const usePolygon = () => {
         if (checkLineOverlap(innerLine, polygonLine)) {
           // innerLine의 type을 polygonLine의 type으로 변경
           if (innerLine.attributes && polygonLine.attributes.type) {
-            // polygonLine.need = false
+            // innerLine이 polygonLine보다 긴 경우 polygonLine.need를 false로 변경
+            if (polygonLine.length < innerLine.length) {
+              polygonLine.need = false
+            }
             innerLine.attributes.planeSize = innerLine.attributes.planeSize ?? polygonLine.attributes.planeSize
             innerLine.attributes.actualSize = innerLine.attributes.actualSize ?? polygonLine.attributes.actualSize
             innerLine.attributes.type = polygonLine.attributes.type
@@ -1008,6 +1011,9 @@ export const usePolygon = () => {
         /*const originInnerStroke = innerLine.stroke
         innerLine.set({ stroke: 'red' })
         canvas.renderAll()*/
+        if (checkLineOverlap(line, innerLine)) {
+          return
+        }
         if (isPointOnLine(line, innerLine.startPoint)) {
           canvas.renderAll()
           if (isSamePoint(line.startPoint, innerLine.startPoint) || isSamePoint(line.endPoint, innerLine.startPoint)) {