1 files changed, 4 insertions, 2 deletions
diff --git a/Bugzilla/Bug.pm b/Bugzilla/Bug.pm
index f24f7a4d2..ff8f651e4 100644
--- a/Bugzilla/Bug.pm
+++ b/Bugzilla/Bug.pm
@@ -2480,9 +2480,11 @@ sub set_all {
     }
 
     if (exists $params->{alias} && $params->{alias}{set}) {
+        my ($removed_aliases, $added_aliases) = diff_arrays(
+            $self->alias, $params->{alias}{set});
         $params->{alias} = {
-            add    => $params->{alias}{set},
-            remove => $self->alias,
+            add    => $added_aliases,
+            remove => $removed_aliases,
         };
     }