Fix the issue when booting latest systemrescue

IMG/cpio/ventoy/hook/arch/ventoy-disk.sh

@@ -49,7 +49,12 @@ done
 
 if [ -n "$1" ]; then
     vtlog "ln -s /dev/$vtDM $1"
-    ln -s /dev/$vtDM "$1"
+    
+    if [ -e "$1" ]; then
+        vtlog "$1 already exist"
+    else
+        ln -s /dev/$vtDM "$1"
+    fi
 else
     vtLABEL=$($BUSYBOX_PATH/blkid /dev/$vtDM | $SED 's/.*LABEL="\([^"]*\)".*/\1/')
     vtlog "vtLABEL is $vtLABEL"
@@ -59,7 +64,11 @@ else
         vtlog "vtLABEL is $vtLABEL from cmdline"
     fi
     
-    ln -s /dev/$vtDM "/dev/disk/by-label/$vtLABEL"
+    if [ -e "/dev/disk/by-label/$vtLABEL" ]; then
+        vtlog "$1 already exist"
+    else
+        ln -s /dev/$vtDM "/dev/disk/by-label/$vtLABEL"
+    fi
 fi 
 
 # OK finish