diff --git a/pandas/core/groupby/groupby.py b/pandas/core/groupby/groupby.py
index 9838cff9b34f9..e385a78142ba5 100644
--- a/pandas/core/groupby/groupby.py
+++ b/pandas/core/groupby/groupby.py
@@ -497,7 +497,6 @@ def __init__(
         self._selection = selection
 
         assert isinstance(obj, NDFrame), type(obj)
-        obj._consolidate_inplace()
 
         self.level = level