INS-04009
INS-04009 means that the flag you specified in Oracle Universal Installer (OUI) command mode is not supported in current situation, the flag is either useless or invalid.
[oracle@test ~]$ $ORACLE_HOME/runInstaller -silent -noconfig -ignoreSysPrereqs ...
...
[INS-04009] The argument [-ignoreSysPrereqs] passed is not supported for the current context DBSetup
In this case, ignoreSysPrereqs is invalid for Oracle database 19c or 21c, whereas ignorePrereq or ignorePrereqFailure is valid to be used to ignore any prerequisite check failures.
Please run the following command for more valid flags.
[oracle@test ~]$ $ORACLE_HOME/runInstaller -help