diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index 513a248f..aad4592a 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -120,13 +120,6 @@ PVE::JSONSchema::register_standard_option('pve-qemu-machine', {
 	optional => 1,
 });
 
-PVE::JSONSchema::register_standard_option('pve-targetstorage', {
-    description => "Mapping from source to target storages. Providing only a single storage ID maps all source storages to that storage. Providing the special value '1' will map each source storage to itself.",
-    type => 'string',
-    format => 'storage-pair-list',
-    optional => 1,
-});
-
 #no warnings 'redefine';
 
 my $nodename_cache;