Hi Carlos,
BASIS people that it is not possible to update a note (from a version to another) via SNOTE because it was implemented via SP.
Here i would like to clear you on terms SAP Note as well as on Support Package.
Note is a code correction to fix specific program or bug & we could apply into the system until relevant SAP SP not applied on the system ( As SP is a collection of fixes for specific component e.g EA_APPL,SAP_ABA..& so on) .
As Note consists of complete information regarding SP level & applicable releases as well,it would be nice to check for the info at the end of Note & compare it with applied SP on system.
Hope this will help you.
Good luck !!