Index: /branches/release-38/lib/MT/Upgrade.pm
===================================================================
--- /branches/release-38/lib/MT/Upgrade.pm (revision 2320)
+++ /branches/release-38/lib/MT/Upgrade.pm (revision 2321)
@@ -940,4 +940,5 @@
 sub core_upgrade_meta {
     my $self = shift;
+
     my $types = MT->registry('object_types');
     my %added_step;
@@ -1012,4 +1013,5 @@
 sub core_upgrade_meta_for_table {
     my $self = shift;
+    return 0 if $Installing;
     my (%param) = @_;
     my $type = $param{type};