diff --git a/csst_common/data_manager.py b/csst_common/data_manager.py
index f0eecc5b56d8e74305e1207ad08b8aa6f2da4a9d..407d78f20b337ecdc4f625eecd941923736ea7ab 100644
--- a/csst_common/data_manager.py
+++ b/csst_common/data_manager.py
@@ -472,8 +472,12 @@ class CsstMsDataManager:
     def l0_detector(self, detector=6):
         """ L0 detector-specific image file path """
         assert detector in self.available_detectors
-        fn = f"{self.telescope}_{self.instrument}_{self.project}_{self.obs_type}_{self.exp_start}_{self.exp_stop}_" \
-             f"{self.obs_id}_{detector:02d}_L{self.level}_V{self.version}.{self.ext}"
+        if self.ver_sim == "C5.2":
+            fn = f"{self.telescope}_{self.instrument}_{self.project}_{self.obs_type}_{self.exp_start}_" \
+                 f"{self.exp_stop}_{self.obs_id}_{detector:02d}_L{self.level}_{self.version}.{self.ext}"
+        else:
+            fn = f"{self.telescope}_{self.instrument}_{self.project}_{self.obs_type}_{self.exp_start}_" \
+                 f"{self.exp_stop}_{self.obs_id}_{detector:02d}_L{self.level}_V{self.version}.{self.ext}"
         fp = os.path.join(self.dir_l0, fn)
         assert os.path.exists(fp)
         return os.path.join(self.dir_l0, fn)
@@ -481,12 +485,8 @@ class CsstMsDataManager:
     def l0_crs(self, detector=6):
         """ L0 cosmic ray file path """
         assert detector in self.available_detectors
-        if self.ver_sim == "C5.2":
-            fn = f"{self.telescope}_{self.instrument}_{self.project}_CRS_{self.exp_start}_{self.exp_stop}_" \
-                 f"{self.obs_id}_{detector:02d}_L{self.level}_{self.version}.{self.ext}"
-        else:
-            fn = f"{self.telescope}_{self.instrument}_{self.project}_CRS_{self.exp_start}_{self.exp_stop}_" \
-                 f"{self.obs_id}_{detector:02d}_L{self.level}_V{self.version}.{self.ext}"
+        fn = f"{self.telescope}_{self.instrument}_{self.project}_CRS_{self.exp_start}_" \
+             f"{self.exp_stop}_{self.obs_id}_{detector:02d}_L{self.level}_V{self.version}.{self.ext}"
         fp = os.path.join(self.dir_l0, fn)
         assert os.path.exists(fp)
         return os.path.join(self.dir_l0, fn)