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Hello, I want to remove the function of changing the nickname. Is this possible? Thanks in advance for your answers.

1 Answer

+3 votes
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Just navigate to admin/users and uncheck the setting Allow users with posts to change their username.

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After I removed the tick, I was able to edit the nickname...
by
That's because you don't have posts. All users who have at least one post can not change their username after removing the tick.
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