ValueError: Can only compare identically-labeled Series objects -python-pandas

Question

i had 2 dataframes : FB7 = Date/Time Ticker Gia today 0 2020-02-01 CTF 23.50 2 2020-02-01 PXL 8.40 3 2020-02-01 DBC 20.52 4 2020-02-01 TCH 32.42 5 2020-02-0