Just a note that you are using the Web Recorder of Katalon Studio, not Katalon Recorder. KR is a separate application completely.
If you want to have the identifier available from one Test Suite into another, then you either have to save the identifier to disk or run the Test Cases or Test Suites together somehow, like in a Test Collection.
There is no WebUI keyword that you can use to save the identifier to disk (text file or spreadsheet) so that you can read it into the next Test Suite. However, there are ways that you can do this, like the below (using the Script tab).
Edit: There are other answers on this forum that you can see other methods to save to disk.
Edit2: You cannot have the spreadsheet open when you run your Test Case as that creates a lock on the file that will cause KS to fail.