tweak

csst_common/data_manager.py

@@ -385,7 +385,7 @@ class CsstMsDataManager:
             raise FileNotFoundError(f"No file found with pattern {pattern} in {dir_l0}")
 
         # parse filename
-        elif ver_sim in ["C5.2", "C6.1"]:
+        if ver_sim in ["C5.2", "C6.1"]:
             pattern = re.compile(
                 r"(?P<telescope>[A-Z]+)_"
                 r"(?P<instrument>[A-Z]+)_"