Erase remove unlocked iCloud password

Your iCloud password is the same as your Apple ID Password. You can change the password, but you can't erase it.

Maybe if we understood more about what you are trying to accomplish, we can help.

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What steps are you using to do it?

Which step are you stuck at?

Need more information. What do you mean by erase unlocked iCloud Password? What exactly are you trying to do. Did you buy a used iPhone? The more information you provide the better able are we to offer help.