Want to know rollback through .sql file

Managing database versions with Liquibase and Spring Boot
· Lecture 21 · A few seconds ago
i trying to use rollback tag but it is not working

–liquibase formatted sql

– changeset test:1


create table phone ( id int primary key, name varchar(255) );


when ever i try to rollback

–liquibase formatted sql

–changeset nimann:v2.0

–rollback tag= v1.1;

–tag=v1.2; but tag is not working can you please help me out

Please provide your actual changelogs, I can’t follow what you provided.