..and it is fine. In fact, it is good. But it is not a mistake if it is repeated. My friend remarked that when it is repeated, the person repeating it has taken to a choice of making it.
How many times did you repeat a mistake when you really love what you do? My guess is never. In addition, your one-off mistake might actually translate to a pathbreaking innovation.
Side Note: Doscovery of the USA was a result of a mistake by Columbus.