I am running a lot of liquibase-scripts on PostgreSQL database, and get error message as I startup Spring Boot:
The problem was the buggy implementation of SequenceExists in Liquibase. Since the changesets with these statements took a very long time and was accidently aborted. Then the next try executing the liquibase-scripts the lock was held.
Therefore, you can execute this DML to update DATABASECHANGELOGLOCK table: