this should fix it

harden

@@ -587,11 +587,8 @@ if [[ -n "$OLD_PORTS" ]]; then
     for port in "${OLD_PORTS[@]}"; do
         # Deny the port in the firewall
         case "$currentFirewall" in
-            ufw)
+            ufw) # There are two rules by default for ipv4 and ipv6
-            PORT_RULE_NUMS="$(sudo ufw status numbered | grep -i "$port" | grep -oP '\[.*?\]' | grep -o '[0-9]')"
+                yes | sudo ufw delete allow "$port"/tcp
-                for PORT_RULE_NUM in ${PORT_RULE_NUMS[@]}; do
-                    yes | sudo ufw delete "$PORT_RULE_NUM"
-                done
             ;;
             firewalld)
                 sudo firewall-cmd --permanent --remove-port="$port"/tcp