FutureWarning: Setting an item of incompatible dtype is deprecated and will raise in a future error of pandas

[x945]

Describe bug

I get the error when I attempt to get earning_dates of some tickers such as FITBP

Simple code that reproduces your problem

import yfinance as yf
f_ticker = yf.Ticker('FITBP')
f_earning = f_ticker.earnings_dates

Warning (from warnings module):
  File "/home/ahmed/.local/lib/python3.10/site-packages/yfinance/base.py", line 2126
    dates.loc[dates[cn] == '-', cn] = "NaN"
FutureWarning: Setting an item of incompatible dtype is deprecated and will raise in a future error of pandas. Value 'NaN' has dtype incompatible with float64, please explicitly cast to a compatible dtype first.

Warning (from warnings module):
  File "/home/ahmed/.local/lib/python3.10/site-packages/yfinance/base.py", line 2126
    dates.loc[dates[cn] == '-', cn] = "NaN"
FutureWarning: Setting an item of incompatible dtype is deprecated and will raise in a future error of pandas. Value 'NaN' has dtype incompatible with float64, please explicitly cast to a compatible dtype first.

Warning (from warnings module):
  File "/home/ahmed/.local/lib/python3.10/site-packages/yfinance/base.py", line 2126
    dates.loc[dates[cn] == '-', cn] = "NaN"
FutureWarning: Setting an item of incompatible dtype is deprecated and will raise in a future error of pandas. Value 'NaN' has dtype incompatible with float64, please explicitly cast to a compatible dtype first.

Debug log

yf.enable_debug_mode()
f_earning = f_ticker.earnings_dates
DEBUG    Entering get_earnings_dates()
DEBUG    Exiting get_earnings_dates()

Bad data proof

No response

yfinance version

0.2.33

Python version

Python 3.10

Operating system

Ubuntu 22.04.3 LTS