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Advanced TheoryTab is still advanced after I edited it

This TheoryTab (https://www.hooktheory.com/theorytab/view/spongebob-squarepants/wishful-thinking) had a bVII (mix) chord making it an advanced tab. I then realised that it’s better to represent it as a IV/IV chord because it’s followed by a IV chord. So I edited it but the difficulty is still advanced instead of intermediate