BitcoinCore does not see balance after private key entry

[Bitcoin]

BitcoinCore does not see balance after private key entry

Please help me understand the situation. I created an address in BitcoinCore to store BTC and extracted a private key to this address (the address was the following type: 31h5a...). This was in 2019. Now I integrated the private key into BitcoinCore and the program does not display my balance! There are 3 addresses displayed in the addresses to receive and if you do a private key extraction from each address it will always be the same key. Addresses of the following type: 1Jm4x... 31h5a... bc1qct... I tried to integrate key into Electrum and the same program does not see my balance. BTC are on address 31h5a... and program apparently displays balance of another address. How do I fix this and access the BTC?

Source: BitcoinCore does not see balance after private key entry