diff --git a/internal-packages/run-engine/src/engine/systems/runAttemptSystem.ts b/internal-packages/run-engine/src/engine/systems/runAttemptSystem.ts
index ce0f8abe4d..f3cd1e075b 100644
--- a/internal-packages/run-engine/src/engine/systems/runAttemptSystem.ts
+++ b/internal-packages/run-engine/src/engine/systems/runAttemptSystem.ts
@@ -188,6 +188,7 @@ export class RunAttemptSystem {
         runTags: true,
         isTest: true,
         idempotencyKey: true,
+        concurrencyKey: true,
         startedAt: true,
         maxAttempts: true,
         taskVersion: true,
@@ -255,6 +256,7 @@ export class RunAttemptSystem {
         createdAt: run.createdAt,
         startedAt: run.startedAt ?? run.createdAt,
         idempotencyKey: run.idempotencyKey ?? undefined,
+        concurrencyKey: run.concurrencyKey ?? undefined,
         maxAttempts: run.maxAttempts ?? undefined,
         version: run.taskVersion ?? "unknown",
         maxDuration: run.maxDurationInSeconds ?? undefined,
diff --git a/packages/core/src/v3/schemas/common.ts b/packages/core/src/v3/schemas/common.ts
index 2928995606..68dd0c2b07 100644
--- a/packages/core/src/v3/schemas/common.ts
+++ b/packages/core/src/v3/schemas/common.ts
@@ -215,6 +215,7 @@ export const TaskRun = z.object({
   createdAt: z.coerce.date(),
   startedAt: z.coerce.date().default(() => new Date()),
   idempotencyKey: z.string().optional(),
+  concurrencyKey: z.string().optional(),
   maxAttempts: z.number().optional(),
   version: z.string().optional(),
   metadata: z.record(DeserializedJsonSchema).optional(),