Change data to data._values in checking condition

Author: makbigc

pandas/core/series.py

@@ -181,9 +181,8 @@ def __init__(self, data=None, index=None, dtype=None, name=None,
                     # astype copies
                     data = data.astype(dtype)
                 else:
-                    # need to copy to avoid aliasing issues
                     # GH21907
-                    if isinstance(data, DatetimeIndex):
+                    if isinstance(data._values, DatetimeIndex):
                         data = data.copy(deep=True)
                     else:
                         data = data._values.copy()