diff --git a/vm/debian-vm.sh b/vm/debian-vm.sh
index 3512f7d..6df528c 100644
--- a/vm/debian-vm.sh
+++ b/vm/debian-vm.sh
@@ -75,6 +75,23 @@ function error_handler() {
   cleanup_vmid
 }
 
+function get_valid_nextid() {
+  local try_id
+  try_id=$(pvesh get /cluster/nextid)
+  while true; do
+    if [ -f "/etc/pve/qemu-server/${try_id}.conf" ] || [ -f "/etc/pve/lxc/${try_id}.conf" ]; then
+      try_id=$((try_id + 1))
+      continue
+    fi
+    if lvs --noheadings -o lv_name | grep -qE "(^|[-_])${try_id}($|[-_])"; then
+      try_id=$((try_id + 1))
+      continue
+    fi
+    break
+  done
+  echo "$try_id"
+}
+
 function cleanup_vmid() {
   if qm status $VMID &>/dev/null; then
     qm stop $VMID &>/dev/null
@@ -161,7 +178,7 @@ function exit-script() {
 }
 
 function default_settings() {
-  VMID="$NEXTID"
+  VMID=$(get_valid_nextid)
   FORMAT=",efitype=4m"
   MACHINE=""
   DISK_SIZE="8G"
@@ -195,9 +212,9 @@ function default_settings() {
 function advanced_settings() {
   METHOD="advanced"
   while true; do
-    if VMID=$(whiptail --backtitle "Proxmox VE Helper Scripts" --inputbox "Set Virtual Machine ID" 8 58 $NEXTID --title "VIRTUAL MACHINE ID" --cancel-button Exit-Script 3>&1 1>&2 2>&3); then
+    if VMID=$(whiptail --backtitle "Proxmox VE Helper Scripts" --inputbox "Set Virtual Machine ID" 8 58 $VMID --title "VIRTUAL MACHINE ID" --cancel-button Exit-Script 3>&1 1>&2 2>&3); then
       if [ -z "$VMID" ]; then
-        VMID="$NEXTID"
+        VMID="$$VMID"
       fi
       if pct status "$VMID" &>/dev/null || qm status "$VMID" &>/dev/null; then
         echo -e "${CROSS}${RD} ID $VMID is already in use${CL}"