In front of the serial number on my 1957 silver certificate is a star instead of a letter. What does this mean? Does ti does change the value of the certificate?

"A star note is paper currency that has a star in the serial number, to indicate that it was issued to replace a note that was damaged or misprinted during production. Because they are rare, star notes are valued by collectors. A 1957 silver certificate star note in crisp uncirculated condition could bring $12 to $15."