On QCX version 8 systems it is possible to change what sample key is generated next when logging in samples.
Open SQL and connect to MSSQLSERVER instance. Start a new SQL query and make sure Fls.Qcx.Core.Config database is chosen from dropdown. Run the following command.
With above command the seed is changed to 50 but it is not visible anywhere. But if the command was succesful; the next sample that get's logged in to QCX will have sample key 51.