diff --git a/src/Backend/SolutionErp.Domain/Contracts/Contract.cs b/src/Backend/SolutionErp.Domain/Contracts/Contract.cs
index b9bcfa8..78ad736 100644
--- a/src/Backend/SolutionErp.Domain/Contracts/Contract.cs
+++ b/src/Backend/SolutionErp.Domain/Contracts/Contract.cs
@@ -20,6 +20,7 @@ public class Contract : AuditableEntity
     public string? NoiDung { get; set; }
     public bool BypassProcurementAndCCM { get; set; }              // HĐ Chủ đầu tư → skip CCM
     public Guid? WorkflowDefinitionId { get; set; }                // Pinned at creation — HĐ cũ chạy version cũ ngay cả khi admin active version mới
+    public Guid? ApprovalWorkflowId { get; set; }                  // [Plan B S29 2026-05-22 Mig 32] Pin schema mới ApprovalWorkflowsV2 — mirror PE Mig 23. V1+V2 coexist: 7 V1 contract giữ WorkflowDefinitionId; V2 mới pin ApprovalWorkflowId. Service ApproveV2Async branch theo field này.
     public DateTime? SlaDeadline { get; set; }                     // Hết hạn phase hiện tại
     public string? DraftData { get; set; }                         // JSON field values (render template)
     public bool SlaWarningSent { get; set; }                       // Flag để không gửi warning 2 lần
@@ -39,6 +40,11 @@ public class Contract : AuditableEntity
     public int? CurrentWorkflowStepIndex { get; set; }
     public int? RejectedAtStepIndex { get; set; }
 
+    // [Plan B S29 2026-05-22 Mig 32] V2 workflow tracking — mirror PE Mig 24.
+    // CurrentApprovalLevelOrder: Cấp đang chờ duyệt (1/2/3) trong Step hiện tại
+    // khi pin ApprovalWorkflowId. Null khi V1 legacy hoặc V2 terminal (DaPhatHanh).
+    public int? CurrentApprovalLevelOrder { get; set; }
+
     public List<ContractApproval> Approvals { get; set; } = new();
     public List<ContractComment> Comments { get; set; } = new();
     public List<ContractAttachment> Attachments { get; set; } = new();