diff --git a/dpgen2/exploration/task/lmp_template_task_group.py b/dpgen2/exploration/task/lmp_template_task_group.py
index c1a4af4a..37b1e475 100644
--- a/dpgen2/exploration/task/lmp_template_task_group.py
+++ b/dpgen2/exploration/task/lmp_template_task_group.py
@@ -183,10 +183,7 @@ def revise_lmp_input_dump(lmp_lines, trj_freq, pimd_bead=None):
         lmp_pimd_traj_name % pimd_bead if pimd_bead is not None else lmp_traj_name
     )
     lmp_lines[idx] = (
-        lmp_lines[idx] = (
-            f"dump            dpgen_dump all custom {trj_freq} {lmp_traj_file_name} id type x y z"
-        )
-        % trj_freq
+        f"dump            dpgen_dump all custom {trj_freq} {lmp_traj_file_name} id type x y z"
     )
     return lmp_lines