diff --git a/src/api.rs b/src/api.rs
index 2a87f08..5255c84 100644
--- a/src/api.rs
+++ b/src/api.rs
@@ -914,7 +914,7 @@ fn handle_prd(
                 roles = proposal_roles;
             }
 
-            relevant_process.insert_concurrent_state(new_state);
+            relevant_process.insert_concurrent_state(new_state)?;
 
             let updated_process = UpdatedProcess {
                 commitment_tx: outpoint,