diff --git a/rdagent/scenarios/data_science/proposal/exp_gen/merge.py b/rdagent/scenarios/data_science/proposal/exp_gen/merge.py
index 906810e0..e541f159 100644
--- a/rdagent/scenarios/data_science/proposal/exp_gen/merge.py
+++ b/rdagent/scenarios/data_science/proposal/exp_gen/merge.py
@@ -230,6 +230,7 @@ class ExpGen2Hypothesis(DSProposalV2ExpGen):
             sota_exp_desc=sota_exp_desc,
             sota_exp=sota_exp_fb[0] if sota_exp_fb else None,
             hypotheses=[new_hypothesis],
+            hypotheses_candidates=[new_hypothesis],
             pipeline=DS_RD_SETTING.coder_on_whole_pipeline,
             failed_exp_feedback_list_desc="",
         )