diff --git a/xCAT-server/sbin/xcatd b/xCAT-server/sbin/xcatd
index 48b75ecdb..8361d89f0 100755
--- a/xCAT-server/sbin/xcatd
+++ b/xCAT-server/sbin/xcatd
@@ -1451,6 +1451,7 @@ sub becomeuser {
     return undef;
 }
 sub populate_site_hash {
+    %::XCATSITEVALS{$_->{key}}=();
     my $sitetab = xCAT::Table->new('site',-create=>0);
     unless ($sitetab) { return; }
     my @records = $sitetab->getAllAttribs(qw/key value/);