diff --git a/components/schemas/errors/Error.yml b/components/schemas/errors/Error.yml
index cb66e7a0..e1c148ed 100644
--- a/components/schemas/errors/Error.yml
+++ b/components/schemas/errors/Error.yml
@@ -91,6 +91,7 @@ properties:
       - 404.infrastructure.cluster
       - 404.infrastructure.autoscale.group
       - 404.infrastructure.model
+      - 404.infrastructure.external-volume
       - 404.monitoring.logs.analytics.rule
       - 404.account
       - 404.container
diff --git a/components/schemas/infrastructure/external-volumes/sources/ceph-rbd/SourceCephRbd.yml b/components/schemas/infrastructure/external-volumes/sources/ceph-rbd/SourceCephRbd.yml
index 5329540a..bf6d758e 100644
--- a/components/schemas/infrastructure/external-volumes/sources/ceph-rbd/SourceCephRbd.yml
+++ b/components/schemas/infrastructure/external-volumes/sources/ceph-rbd/SourceCephRbd.yml
@@ -27,12 +27,6 @@ properties:
             items:
               $ref: "./SourceCephRbdMonitor.yml"
           - type: "null"
-      fsid:
-        type: string
-        description: >
-          Ceph cluster FSID (UUID). Optional; used for additional validation or
-          to ensure the client connects to the intended cluster.
-        format: uuid
       client:
         $ref: "./SourceCephRbdClientIdentity.yml"
       image: