def b = new Book(title: "The Shining")
b.validate()
if (b.hasErrors()) {
    // clear the list of errors
    b.clearErrors()
    // fix the validation issues
    b.author = "Stephen King"
    // re-validate
    b.validate()
}clearErrors
Purpose
Resets the list of errors on a domain class. This may be useful if a domain class contains errors because of binding problems or validation problems. The errors may be corrected programatically. Validation may continue to fail unless the errors are cleared.