my ipad no longer connects to my wifi and says the password is incorrect when I know it is correct as it is working on my computer and other ipad

I was able to connect to wifi at both school and home on my ipad 5.  However, now I am not able to connect to the wifi at home as the ipad states I am putting in the wrong password.

However, I know the password is right since I used it for my computer and other ipad which are connected to the internet.

Can anyone please help?  I have already tried resetting the settings several times and the wifi settings will not let me forget this network.

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