I am fortunate that I work for a boss who understands this and as long as we can recover and not repeat the same mistakes, it's just part of learning new technologies.  Sadly there are a lot of places where this is not the case and I've worked with a few individuals who are so afraid of being called out for mistakes that they conceal them when it happens.  This mindset is dangerous because the rest of us are sent down multiple, incorrect paths when we try and troubleshoot the issue when it could have been fixed easily.  

Mea culpa should not be seen as a bad thing unless you keep repeating the same mistakes.