diff --git a/.github/workflows/CI-CD_Pipeline.yml b/.github/workflows/CI-CD_Pipeline.yml
index 944ffa10..5bd0fc96 100644
--- a/.github/workflows/CI-CD_Pipeline.yml
+++ b/.github/workflows/CI-CD_Pipeline.yml
@@ -157,7 +157,8 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Set lowercase repo name
-        run: echo "IMAGE_PREFIX=${GITHUB_REPOSITORY,,}" >> $GITHUB_ENV
+        run: |
+          echo "IMAGE_PREFIX=$(echo $GITHUB_REPOSITORY | tr '[:upper:]' '[:lower:]')" >> $GITHUB_ENV
 
       - name: Download backend jar
         uses: actions/download-artifact@v4
@@ -194,7 +195,8 @@ jobs:
 
     steps:
       - name: Set lowercase repo name
-        run: echo "IMAGE_PREFIX=${GITHUB_REPOSITORY,,}" >> $GITHUB_ENV
+        run: |
+          echo "IMAGE_PREFIX=$(echo $GITHUB_REPOSITORY | tr '[:upper:]' '[:lower:]')" >> $GITHUB_ENV
 
       - name: Create prod .env file
         run: |
@@ -238,8 +240,8 @@ jobs:
   
             # 최신 이미지 pull & 컨테이너 실행
             docker pull ${{ env.REGISTRY }}/${{ env.IMAGE_PREFIX }}/${{ env.DOCKER_IMAGE_NAME }}:latest
-            docker stop app1 2>/dev/null
-            docker rm app1 2>/dev/null
+            docker stop app1 2>/dev/null || true
+            docker rm app1 2>/dev/null || true
             docker run --env-file /home/ec2-user/prod.env -d --name app1 -p 8080:8080 \
             ${{ env.REGISTRY }}/${{ env.IMAGE_PREFIX }}/${{ env.DOCKER_IMAGE_NAME }}:latest