diff --git a/roles/teku/tasks/main.yaml b/roles/teku/tasks/main.yaml
index f0bf4e43..00449c1c 100644
--- a/roles/teku/tasks/main.yaml
+++ b/roles/teku/tasks/main.yaml
@@ -1,3 +1,6 @@
+- name: Validate inputs
+  ansible.builtin.import_tasks: validations.yaml
+
 - name: Setup teku
   ansible.builtin.import_tasks: setup.yaml
   when: not teku_cleanup
diff --git a/roles/teku/tasks/validations.yaml b/roles/teku/tasks/validations.yaml
new file mode 100644
index 00000000..4104f3d1
--- /dev/null
+++ b/roles/teku/tasks/validations.yaml
@@ -0,0 +1,4 @@
+- name: Check if consensus client supports blobber configuration
+  ansible.builtin.fail:
+    msg: "Error: Teku cannot run checkpoint sync if the initial-state flag is already defined"
+  when: "teku_checkpoint_sync_enabled and (teku_container_command_extra_args | default('') | regex_search('initial-state') != None)"