diff --git a/pyproject.toml b/pyproject.toml
index 61059b8c4e..7322f2e4c6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -54,7 +54,7 @@ agent = [
     "agentscope"
 ]
 rm_gallery = [
-    "rm-gallery"
+    "rm-gallery>=0.1.1"
 ]
 dev = [
     "pre-commit>=2.17.0",
diff --git a/tests/explorer/scheduler_test.py b/tests/explorer/scheduler_test.py
index ef8077ff79..20ecb179c9 100644
--- a/tests/explorer/scheduler_test.py
+++ b/tests/explorer/scheduler_test.py
@@ -403,31 +403,44 @@ async def test_split_tasks(self):
         self.config.check_and_update()
         scheduler = Scheduler(self.config, [DummyModel.remote(), DummyModel.remote()])
         await scheduler.start()
+        exp_list = []
 
         tasks = generate_tasks(4, repeat_times=8)  # ceil(8 / 2) == 4
         scheduler.schedule(tasks, batch_id=1)
         results = await scheduler.get_results(batch_id=1)
         self.assertEqual(len(results), 4 * 4)
-        self.assertEqual(len(self.queue.read(batch_size=4 * 8)), 4 * 8)
+        exps = self.queue.read(batch_size=4 * 8)
+        self.assertEqual(len(exps), 4 * 8)
+        exp_list.extend(exps)
         with self.assertRaises(TimeoutError):
             self.queue.read(batch_size=1)
 
         tasks = generate_tasks(4, repeat_times=5)  # ceil(5 / 2) == 3
-        scheduler.schedule(tasks, batch_id=1)
-        results = await scheduler.get_results(batch_id=1)
+        scheduler.schedule(tasks, batch_id=2)
+        results = await scheduler.get_results(batch_id=2)
         self.assertEqual(len(results), 4 * 3)
-        self.assertEqual(len(self.queue.read(batch_size=4 * 5)), 4 * 5)
+        exps = self.queue.read(batch_size=4 * 5)
+        self.assertEqual(len(exps), 4 * 5)
+        exp_list.extend(exps)
         with self.assertRaises(TimeoutError):
             self.queue.read(batch_size=1)
 
         tasks = generate_tasks(3, repeat_times=1)  # ceil(1 / 2) == 1
-        scheduler.schedule(tasks, batch_id=1)
-        results = await scheduler.get_results(batch_id=1)
+        scheduler.schedule(tasks, batch_id=3)
+        results = await scheduler.get_results(batch_id=3)
         self.assertEqual(len(results), 3 * 1)
-        self.assertEqual(len(self.queue.read(batch_size=3 * 1)), 3 * 1)
+        exps = self.queue.read(batch_size=3 * 1)
+        self.assertEqual(len(exps), 3 * 1)
+        exp_list.extend(exps)
         with self.assertRaises(TimeoutError):
             self.queue.read(batch_size=1)
 
+        # test group_id and unique_id
+        group_ids = [exp.group_id for exp in exp_list]
+        self.assertEqual(len(set(group_ids)), 11)  # 4 + 4 + 3
+        unique_ids = [exp.unique_id for exp in exp_list]
+        self.assertEqual(len(unique_ids), len(set(unique_ids)))
+
         await scheduler.stop()
 
     def tearDown(self):
diff --git a/tests/explorer/workflow_test.py b/tests/explorer/workflow_test.py
index 944d9573a0..20a8c5064c 100644
--- a/tests/explorer/workflow_test.py
+++ b/tests/explorer/workflow_test.py
@@ -22,6 +22,7 @@ class MockResponse:
     reward: float = 0.0
     metrics: Optional[Dict[str, float]] = None
     info: Optional[Dict] = None
+    unique_id: Optional[str] = "0"
 
 
 class DummyWorkflow(Workflow):
@@ -237,7 +238,6 @@ def test_gsm8k_workflow(self) -> None:
         self.assertEqual(experiences[2].reward, -0.1)
         self.assertEqual(experiences[3].reward, 1.1)
 
-    @unittest.skip("Skip for now, need to fix import issues of RM-Gallery")
     def test_rm_gallery_workflow(self) -> None:
         model = MagicMock()
         model.chat.return_value = [
diff --git a/trinity/algorithm/sample_strategy/mix_sample_strategy.py b/trinity/algorithm/sample_strategy/mix_sample_strategy.py
index 0db24ab3a5..c6858931b1 100644
--- a/trinity/algorithm/sample_strategy/mix_sample_strategy.py
+++ b/trinity/algorithm/sample_strategy/mix_sample_strategy.py
@@ -91,6 +91,7 @@ def to_data_proto_mix(experiences: Experiences, is_expert_mask: torch.tensor) ->
     position_ids = torch.clip(cumsum - 1, 0, None).long()
     batch_dict = {
         "uid": np.array(experiences.group_ids),
+        "unique_ids": np.array(experiences.unique_ids),
         "position_ids": position_ids,
         "input_ids": experiences.tokens.long(),
         "responses": experiences.tokens[:, experiences.prompt_length :].long(),
diff --git a/trinity/algorithm/sample_strategy/utils.py b/trinity/algorithm/sample_strategy/utils.py
index d578248c1d..f9df00ee4e 100644
--- a/trinity/algorithm/sample_strategy/utils.py
+++ b/trinity/algorithm/sample_strategy/utils.py
@@ -14,6 +14,7 @@ def to_data_proto(experiences: Experiences) -> DataProto:
     position_ids = torch.clip(cumsum - 1, 0, None).long()
     batch_dict = {
         "uid": np.array(experiences.group_ids),
+        "unique_ids": np.array(experiences.unique_ids),
         "position_ids": position_ids,
         "input_ids": experiences.tokens.long(),
         "responses": experiences.tokens[:, experiences.prompt_length :].long(),
diff --git a/trinity/common/experience.py b/trinity/common/experience.py
index fd499c1ba6..56bdd1c4c5 100644
--- a/trinity/common/experience.py
+++ b/trinity/common/experience.py
@@ -27,6 +27,7 @@ class Experience:
     info: Optional[dict] = None
     metrics: Optional[dict[str, float]] = None
     group_id: str = ""  # for grpo
+    unique_id: str = ""
 
     def __post_init__(self):
         if self.action_mask is not None:
@@ -96,6 +97,7 @@ class Experiences:
     prompt_length: int
     logprobs: Optional[Tensor]
     group_ids: List[str]
+    unique_ids: List[str]
 
     @property
     def batch_size(self) -> int:
@@ -119,10 +121,12 @@ def gather_experiences(
                 logprobs=torch.empty(0, dtype=torch.float32),
                 prompt_length=torch.empty(0, dtype=torch.int32),
                 group_ids=[],
+                unique_ids=[],
             )
         max_prompt_length = max([exp.prompt_length for exp in experiences])
         max_response_length = max([len(exp.tokens) - exp.prompt_length for exp in experiences])
         group_ids = [exp.group_id for exp in experiences]
+        unique_ids = [exp.unique_id for exp in experiences]
         tokens_dtype = experiences[0].tokens.dtype
         tokens = torch.stack(
             [
@@ -209,6 +213,7 @@ def gather_experiences(
 
         return cls(
             group_ids=group_ids,
+            unique_ids=unique_ids,
             tokens=tokens,
             rewards=rewards,
             attention_masks=attention_masks,
@@ -250,6 +255,7 @@ def gather_dpo_experiences(
                 logprobs=torch.empty(0, dtype=torch.float32),
                 prompt_length=torch.empty(0, dtype=torch.int32),
                 group_ids=[],
+                unique_ids=[],
             )
 
         # TODO: exp.tokens in DPO are prompt tokens
@@ -262,6 +268,11 @@ def gather_dpo_experiences(
         max_response_length = max([len(response) for response in response_tokens])  # type: ignore
 
         group_ids = list(chain.from_iterable([repeat(exp.group_id, 2) for exp in experiences]))
+        unique_ids = list(
+            chain.from_iterable(
+                [(f"{exp.unique_id}/1", f"{exp.unique_id}/0") for exp in experiences]
+            )
+        )
         tokens_dtype = experiences[0].tokens.dtype
         tokens = torch.stack(
             [
@@ -298,6 +309,7 @@ def gather_dpo_experiences(
 
         return cls(
             group_ids=group_ids,
+            unique_ids=unique_ids,
             tokens=tokens,
             attention_masks=attention_masks,
             prompt_length=max_prompt_length,
diff --git a/trinity/common/rewards/reward_fn.py b/trinity/common/rewards/reward_fn.py
index ee443ed085..c6fe5bb58a 100644
--- a/trinity/common/rewards/reward_fn.py
+++ b/trinity/common/rewards/reward_fn.py
@@ -69,7 +69,7 @@ def _build_sample_from_experience(
         ]
 
         sample = DataSample(
-            unique_id="0",  # TODO: Generate unique ID
+            unique_id=experience.unique_id,
             input=to_rm_gallery_messages(messages),
             output=output,
             metadata=experience.info,
diff --git a/trinity/explorer/scheduler.py b/trinity/explorer/scheduler.py
index ffe684ef61..459793d2c8 100644
--- a/trinity/explorer/scheduler.py
+++ b/trinity/explorer/scheduler.py
@@ -56,7 +56,7 @@ def _create_runner(self):
                     "env_vars": self.config.explorer.env_vars,
                 },
             )
-            .remote(self.config, self.rollout_model, self.auxiliary_models)
+            .remote(self.config, self.rollout_model, self.auxiliary_models, self.runner_id)
         )
 
     async def run_with_retry(self, task: TaskWrapper) -> Tuple[Status, int]:
diff --git a/trinity/explorer/workflow_runner.py b/trinity/explorer/workflow_runner.py
index e7eec9240f..b973a114d2 100644
--- a/trinity/explorer/workflow_runner.py
+++ b/trinity/explorer/workflow_runner.py
@@ -2,6 +2,7 @@
 """The Workflow Runner Moudle."""
 import time
 import traceback
+import uuid
 from collections import defaultdict
 from dataclasses import dataclass
 from typing import List, Optional
@@ -31,6 +32,7 @@ def __init__(
         config: Config,
         model: InferenceModel,
         auxiliary_models: Optional[List[InferenceModel]] = None,
+        runner_id: Optional[int] = None,
     ) -> None:
         self.config = config
         self.experience_buffer = get_buffer_writer(
@@ -52,6 +54,7 @@ def __init__(
                 self.auxiliary_models.append(api_client)
         self.logger = get_logger(__name__)
         self.workflow_instance = None
+        self.runner_id = runner_id
 
     def is_alive(self):
         return True
@@ -78,8 +81,11 @@ def run_task(self, task: Task) -> Status:
             assert exps is not None and len(exps) > 0, "An empty experience is generated"
             metrics: dict[str, List[float]] = defaultdict(list)
             # set group id
-            for exp in exps:
+            for idx, exp in enumerate(exps):
                 setattr(exp, "group_id", task.group_id)
+                setattr(
+                    exp, "unique_id", f"{task.group_id}/{self.runner_id}/{str(uuid.uuid4())[:6]}"
+                )
 
                 if not hasattr(exp, "info") or exp.info is None:
                     exp.info = {}