Duplicate columns

[fboundy]

/homeassistant/appdaemon/apps/pv_opt/pv_opt.py:3421: UserWarning: DataFrame columns are not unique, some columns will be omitted.
| {col: df[["period_start", col]].to_dict("records") for col in cols if col in df.columns}

[stevebuk1]

With later releases (4.0.6 onwards I think), this has now disappeared from my logs.