diff --git a/cookbooks/aws-parallelcluster-slurm/resources/munge_key_manager.rb b/cookbooks/aws-parallelcluster-slurm/resources/munge_key_manager.rb
index daebf1846..4f4ad6118 100644
--- a/cookbooks/aws-parallelcluster-slurm/resources/munge_key_manager.rb
+++ b/cookbooks/aws-parallelcluster-slurm/resources/munge_key_manager.rb
@@ -62,6 +62,10 @@ def generate_munge_key
     cwd '/tmp'
     code <<-GENERATE_KEY
       set -e
+      # If the /etc/munge/munge.key already exists, the /usr/sbin/mungekey --verbose command will report an error
+      if [ -f /etc/munge/munge.key ]; then
+        rm -f /etc/munge/munge.key
+      fi
       /usr/sbin/mungekey --verbose
       chown #{node['cluster']['munge']['user']}:#{node['cluster']['munge']['group']} /etc/munge/munge.key
       chmod 0600 /etc/munge/munge.key