Datatype error while processing query from Postgresql

Hi, have added Postgresql connection and created dataframe which has below datatype:
object_id int64
discovery_id int64
schema object
object_type object
object_name object
no_of_rows int64
table_size_mb int64
lines_of_code int64
object_created_datetime datetime64[ns, UTC]
created_at datetime64[ns, UTC]
modified_at datetime64[ns, UTC]

while running Agent, I am getting below error:
**KeyError: 'datetime64_ns_utc_'**

Could you please help to resolve this?