How to get my iPhone to ask for password on Wi-Fi?

I can't remember my password but its between two choices. I tried the first one, and it was wrong. But now every time I go into my Wi-Fi in my Wi-Fi settings it just tried to connect and doesn't ask for a password, hence the reason it keeps saying "can't connect to___" how can I get if to ask for a password again?

Disassemble it and put it back again and it ask you of your password to the Wi-Fi

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