diff --git a/.github/workflows/plugin_update.yml b/.github/workflows/plugin_update.yml
index 9bbe7901..a26bec96 100644
--- a/.github/workflows/plugin_update.yml
+++ b/.github/workflows/plugin_update.yml
@@ -56,18 +56,7 @@ jobs:
               echo "No plugins need to be updated"
           else
               # Changes detected
-              echo "Plugins have been updated, creating a pull request"
-
-              # Create and checkout new branch
-              git checkout -b "$BRANCH_NAME" 
-
-              # Add and commit changes
-              git add dockerfiles/plugins.txt
-              git commit -m "chore(jenkins): Update Jenkins plugins"
-
-              # Push changes to GitHub
-              git push -u origin "$BRANCH_NAME"
-
-              # Create pull request using gh command
-              gh pr create --title "chore(jenkins): Updates Jenkins plugins" --body "This pull request updates the Jenkins plugins listed in \`plugins.txt\`." --base "$BASE_BRANCH" --head "$BRANCH_NAME"
+              echo "Plugins have been updated, creating a pull request or modifying an existing one if it exists"
+              chmod +x ./.github/workflows/plugins-update-pr.sh
+              ./.github/workflows/plugins-update-pr.sh
           fi
diff --git a/.github/workflows/plugins-update-pr.sh b/.github/workflows/plugins-update-pr.sh
new file mode 100755
index 00000000..e4f115ee
--- /dev/null
+++ b/.github/workflows/plugins-update-pr.sh
@@ -0,0 +1,45 @@
+#!/bin/bash
+# This script is used to update Jenkins plugins and create a pull request with the updates.
+# It first checks if there is an existing pull request with the same title.
+# If there is, it checks out the branch of the existing pull request.
+# If there isn't, it creates and checks out a new branch.
+# Then, it adds the updated plugins.txt file to the staging area and amends the latest commit with the changes.
+# Finally, it pushes the changes to the 'origin' repository and creates a new pull request if there is no existing one.
+
+# If changes are detected, a pull request is created or an existing one is modified.
+echo "Plugins have been updated, creating a pull request or modifying an existing one if it exists"
+
+# Set the default repository for the 'gh' command to 'gounthar/quickstart-tutorials'.
+# gh repo set-default gounthar/quickstart-tutorials
+
+# Define the title of the pull request.
+PR_TITLE="chore(jenkins): Updates Jenkins plugins"
+
+# Check if there is an existing pull request with the same title.
+# If there is, get the branch name of the existing pull request.
+# If there isn't, set EXISTING_PR_BRANCH to an empty string.
+# shellcheck disable=SC1073
+EXISTING_PR=$(gh pr list --search "$PR_TITLE" --json number,headRefName)
+EXISTING_PR_BRANCH=$(echo "$EXISTING_PR" | jq -r 'if (type=="array" and length > 0) then .[0].data.repository.pullRequests.nodes[0].headRefName else "" end')
+
+# If there is no existing pull request, create and checkout a new branch.
+if [ -z "$EXISTING_PR_BRANCH" ]; then
+  git checkout -b "$BRANCH_NAME"
+else
+  # If there is an existing pull request, checkout the existing branch.
+  git checkout "$EXISTING_PR_BRANCH"
+fi
+
+# Add the updated plugins.txt file to the staging area.
+git add dockerfiles/plugins.txt
+
+# Amend the latest commit with the changes in the staging area. The commit message is not changed.
+git commit --amend --no-edit
+
+# Push the changes to the 'origin' repository. The '-u' option sets the upstream branch to 'origin/HEAD'.
+git push -u origin HEAD
+
+# If there is no existing pull request, create a new one.
+if [ -z "$EXISTING_PR_BRANCH" ]; then
+  gh pr create --title "$PR_TITLE" --body "This pull request updates the Jenkins plugins listed in \`plugins.txt\`." --base "$BASE_BRANCH" --head "$BRANCH_NAME"
+fi
\ No newline at end of file