This does not mean that it is a different mutation.
According to the most recent publications, 95 different mutations have been reported.
The scientists believe many different mutations in the gene may cause albinism.
There are numerous different mutations which cause each type of haemophilia.
Presumably, different mutations were available in each population for natural selection to work on.
Conversely, several different mutations may present themselves as the same disease.
Many different mutations can inactivate a gene, but few will change its function in a specific way.
At present more than 600 different mutations have been described.
A species can bifurcate into two different mutations if conditions require it.
A total of over 600 different mutations is known.