diff --git a/CHANGELOG.unreleased.md b/CHANGELOG.unreleased.md
index df126c76b..7277acc79 100644
--- a/CHANGELOG.unreleased.md
+++ b/CHANGELOG.unreleased.md
@@ -12,6 +12,7 @@
 > Users must be able to say: “I had this issue, happy to know it's fixed”
 
 - [Plugin/auth-saml] Certificate input support multiline (PR [#6403](https://github.com/vatesfr/xen-orchestra/pull/6403))
+- [Storage/Pool] Fix `an error as occured` (PR [#6404](https://github.com/vatesfr/xen-orchestra/pull/6404))
 
 ### Packages to release
 
diff --git a/packages/xo-server/src/xapi-object-to-xo.mjs b/packages/xo-server/src/xapi-object-to-xo.mjs
index 8d536d4a6..602ac298b 100644
--- a/packages/xo-server/src/xapi-object-to-xo.mjs
+++ b/packages/xo-server/src/xapi-object-to-xo.mjs
@@ -107,7 +107,10 @@ const TRANSFORMS = {
       current_operations: obj.current_operations,
       default_SR: link(obj, 'default_SR'),
       HA_enabled: Boolean(obj.ha_enabled),
-      haSrs: obj.$ha_statefiles.map(vdi => link(vdi, 'SR')),
+
+      // ignore undefined VDIs, which occurs if the objects were not fetched/cached yet.
+      haSrs: obj.$ha_statefiles.filter(vdi => vdi !== undefined).map(vdi => link(vdi, 'SR')),
+
       master: link(obj, 'master'),
       tags: obj.tags,
       name_description: obj.name_description,