title: Code Sign error: Certificate identity 'iPhone Developer: My Name (xxx)' appears more than once in the keychain
body: <p>I m stuck with this error:</p>
  
  <p>Code Sign error: Certificate identity 'iPhone Developer: My Name (xxx)' appears more than once in the keychain. The codesign tool requires there only be one.</p>
  
  <p>I try to renew the build a new CSR, remove the old certificate, build a new one, again and again and again and this error is still present</p>
  
  <p>in the keychain I dont see any duplicated certificate and if I remove the only one I can see in the keychain , Xcode complains that the certificate can't be found ...</p>