liquibase: diff always generates indexes

I am using spring-boot with the liquibase-maven-plugin plugin to generate database changes according to my classes, but the "mvn compile liquibase: diff" command always generates removals and inclusions of indexes and foreign keys even that the bank is up to date and has no change in the classes (and consequently, there should be no change in the bank). Anyone have any ideas if this is right or how to avoid it?