Not able to get the diff changelog file between cassandra DB

Hi I tried to set up an environment to test the features of Diff compare and generate the Diff log file.
I’m using Cassandra DB as my source and target connection but when I run the command “liquibase --changeLogFile=diff.sql diffChangeLog” I didn’t get anything in the file it is blank.

It has to give me the difference because there is a difference in the tables.

It would really help if you can provide me the Config file for Cassandra as well to set the target and source to get the diff.