Problems with update function in koalas - pyspark pandas.

Hi I am using "from pyspark import pandas as ps" in a master build yesterday.
I do have some columns that I need to join to one.
In pandas I use update.

54 FD_OBJECT_SUPPLIES_SERVICES_OBJECT_SUPPLY_SERVICE_ADDITIONAL_INFORMATION 23 non-null object
55 FD_OBJECT_SUPPLIES_SERVICES_OBJECT_SUPPLY_SERVICE_ADDITIONAL_INFORMATION.P 24348 non-null object

pd1['FD_OBJECT_SUPPLIES_SERVICES_OBJECT_SUPPLY_SERVICE_ADDITIONAL_INFORMATION'].update(pd1['FD_OBJECT_SUPPLIES_SERVICES_OBJECT_SUPPLY_SERVICE_ADDITIONAL_INFORMATION.P'])

---------------------------------------------------------------------------
AssertionError Traceback (most recent call last)
/tmp/ipykernel_73/391781247.py in <module>
----> 1 pd1['FD_OBJECT_SUPPLIES_SERVICES_OBJECT_SUPPLY_SERVICE_ADDITIONAL_INFORMATION'].update(pd1['FD_OBJECT_SUPPLIES_SERVICES_OBJECT_SUPPLY_SERVICE_ADDITIONAL_INFORMATION.P'])

/opt/spark/python/pyspark/pandas/series.py in update(self, other)
4549 raise TypeError("'other' must be a Series")
4550
-> 4551 combined = combine_frames(self._psdf, other._psdf, how="leftouter")
4552
4553 this_scol = combined["this"]._internal.spark_column_for(self._column_label)

/opt/spark/python/pyspark/pandas/utils.py in combine_frames(this, how, preserve_order_column, *args)
139 elif len(args) == 1 and isinstance(args[0], DataFrame):
140 assert isinstance(args[0], DataFrame)
--> 141 assert not same_anchor(
142 this, args[0]
143 ), "We don't need to combine. `this` and `that` are same."

AssertionError: We don't need to combine. `this` and `that` are same.

pd1.info()

54 FD_OBJECT_SUPPLIES_SERVICES_OBJECT_SUPPLY_SERVICE_ADDITIONAL_INFORMATION 23 non-null object
55 FD_OBJECT_SUPPLIES_SERVICES_OBJECT_SUPPLY_SERVICE_ADDITIONAL_INFORMATION.P 24348 non-null object