If the error occurs when you try to turn on the Switch, like in this photo, the second line should say "Program: XXXXXXXX", where XXXXX is an alphanumeric code. Go to the /atmosphere/contents folder on your microSD and delete the folder whose name is the same XXXXX code and try again.
This is an English forum, so in the future, try to communicate in English, even if you are not very good with the language (as I am doing now - my Spanish is very weak). Many more of us speak English than Spanish, so the chances of you getting the help you need are also higher.