certificate - Debugging on my iPhone problem -

hey, i'm getting error when i'm trying debug on iphone.

codesign error: certificate identity 'iphone developer: sweppi (yt9ak96ez4)' appears more once in keychain. codesign tool requires there one.

i know need delete certificate in keychain in key chain find certificate?

thanks!

use keychain access program. select certificate categories on lower-left panel. , make sure there no "sweppi" dups.