diff --git a/server-rs/crates/platform-tripo/src/common/mapping.rs b/server-rs/crates/platform-tripo/src/common/mapping.rs
index bd42255dc..bfcb32449 100644
--- a/server-rs/crates/platform-tripo/src/common/mapping.rs
+++ b/server-rs/crates/platform-tripo/src/common/mapping.rs
@@ -35,11 +35,11 @@ pub(crate) fn map_task(task: Task) -> Result<TripoTaskSnapshot, TripoError> {
         status,
         progress: task.progress,
         output,
-        failure: (task.error_code.is_some() || task.error_message.is_some()).then(|| {
-            TripoTaskFailure {
-                code: task.error_code,
-                message: task.error_message,
-            }
+        // 只有非成功的终态才可能带 provider 失败信息：provider 留下过期错误字段时，
+        // 已完成的快照不该再挂 failure，否则快照内部自相矛盾。
+        failure: is_terminal_failure(status).then(|| TripoTaskFailure {
+            code: task.error_code,
+            message: task.error_message,
         }),
         created_at: task.created_at,
         completed_at: task.completed_at,
@@ -72,6 +72,14 @@ fn map_status(status: TaskStatus) -> Result<Model3dTaskStatus, TripoError> {
     }
 }
 
+/// 失败 / 取消 / 过期是「任务已结束且没有可用产物」的终态，只有它们允许携带失败信息。
+fn is_terminal_failure(status: Model3dTaskStatus) -> bool {
+    matches!(
+        status,
+        Model3dTaskStatus::Failed | Model3dTaskStatus::Cancelled | Model3dTaskStatus::Expired
+    )
+}
+
 fn map_output(
     task_id: &str,
     task_type: &TripoTaskType,