diff --git a/etc/sample_affinity_policy.yaml b/etc/sample_affinity_policy.yaml
deleted file mode 100644
index 76874d8..0000000
--- a/etc/sample_affinity_policy.yaml
+++ /dev/null
@@ -1,10 +0,0 @@
-# See also: https://docs.openstack.org/senlin/latest/user/policy_types/affinity.html
----
-type: senlin.policy.affinity
-version: 1.0
-properties:
-  servergroup:
-    name: gitlab-runners
-    policies: soft-anti-affinity
-  availability_zone: nova
-  enable_drs_extension: false
diff --git a/etc/sample_profile.yaml b/etc/sample_profile.yaml
deleted file mode 100644
index f200530..0000000
--- a/etc/sample_profile.yaml
+++ /dev/null
@@ -1,17 +0,0 @@
-# See also: https://docs.openstack.org/senlin/latest/user/profile_types/nova.html#ref-nova-profile
----
-type: os.nova.server
-version: 1.2
-properties:
-  name: runner
-  flavor: 5
-  image: "fedora-38"
-  # key_name: oskey
-  networks:
-    - network: external
-      security_groups: allow_ipmi_ssh
-  metadata:
-    tags: gitlab-runner
-  user_data: |
-    #cloud-config
-    update_packages: true
diff --git a/provider.go b/provider.go
index 548c3bb..f50462c 100644
--- a/provider.go
+++ b/provider.go
@@ -209,7 +209,10 @@ func (g *InstanceGroup) getInstances(ctx context.Context, initial bool) ([]serve
 
 func (g *InstanceGroup) createInstance(ctx context.Context, index int) (string, error) {
 	spec := new(ExtCreateOpts)
-	copier.Copy(spec, &g.ServerSpec)
+	err := copier.Copy(spec, &g.ServerSpec)
+	if err != nil {
+		return "", err
+	}
 
 	spec.Name = fmt.Sprintf(g.ServerSpec.Name, index)
 	if spec.Metadata == nil {