Command to know the qsys version

So that command is usually in the _hw.tcl file for a component, usually a custom component. It means that that component was originally created in 18.1 but it will work with newer versions of Quartus. It's a version check.

If there is a mismatch, as long as the version in use is newer (>18.1) it will be fine. The tool checks to see if there is a newer version of a component and if there is, the upgrade IP dialog box appears when you open the project in the newer version of the software, giving you the option to update.

But if there is no newer version of the IP, then it's fine as is.