diff --git a/temporal-sdk/src/main/java/io/temporal/internal/common/WorkflowExecutionUtils.java b/temporal-sdk/src/main/java/io/temporal/internal/common/WorkflowExecutionUtils.java
index 7041750d6..4739a346c 100644
--- a/temporal-sdk/src/main/java/io/temporal/internal/common/WorkflowExecutionUtils.java
+++ b/temporal-sdk/src/main/java/io/temporal/internal/common/WorkflowExecutionUtils.java
@@ -313,7 +313,6 @@ public static boolean isCommandEvent(HistoryEvent event) {
       case EVENT_TYPE_SIGNAL_EXTERNAL_WORKFLOW_EXECUTION_INITIATED:
       case EVENT_TYPE_UPSERT_WORKFLOW_SEARCH_ATTRIBUTES:
       case EVENT_TYPE_WORKFLOW_EXECUTION_UPDATE_ACCEPTED:
-      case EVENT_TYPE_WORKFLOW_EXECUTION_UPDATE_REJECTED:
       case EVENT_TYPE_WORKFLOW_EXECUTION_UPDATE_COMPLETED:
       case EVENT_TYPE_WORKFLOW_PROPERTIES_MODIFIED:
       case EVENT_TYPE_NEXUS_OPERATION_SCHEDULED:
diff --git a/temporal-sdk/src/main/java/io/temporal/internal/statemachines/WorkflowStateMachines.java b/temporal-sdk/src/main/java/io/temporal/internal/statemachines/WorkflowStateMachines.java
index b66e948c4..17c59cda1 100644
--- a/temporal-sdk/src/main/java/io/temporal/internal/statemachines/WorkflowStateMachines.java
+++ b/temporal-sdk/src/main/java/io/temporal/internal/statemachines/WorkflowStateMachines.java
@@ -1144,14 +1144,6 @@ private void validateCommand(Command command, HistoryEvent event) {
               true,
               commandAttributes.getMessageId().endsWith("accept"));
           break;
-        case EVENT_TYPE_WORKFLOW_EXECUTION_UPDATE_REJECTED:
-          assertMatch(
-              command,
-              event,
-              "messageType",
-              true,
-              commandAttributes.getMessageId().endsWith("reject"));
-          break;
         case EVENT_TYPE_WORKFLOW_EXECUTION_UPDATE_COMPLETED:
           assertMatch(
               command,