This has already been fixed and the fix will be available from next release. Actually before Indexes needed to be the same. But the error message was misleading (and there even were some situations where they needed not be quite the same).
Actually we a SJA for Linux ready with this fix. Another user confirmed the fix using this one. If it is priority for you I think we can build SJA for Windows as well tomorrow.
EDIT&ADD: From next release tables may have different indexes with the exception of the Primary Key (or Unique Index) used for sync.