Dear K.Kunnaree,
My support checked Database and found some errors when run dbcc tablealloc and dbcc indexalloc as attached log files which seem there might be some problem on OAM that need to fix before the upgrade.
Could you please help to ask your team to verify the errors and fix it?
Also there are other errors relate to Sybase environment as explained by my support in email below krab.
We are still verifying our upgrade step in our lab. Keep you posted.