url=jdbc:postgresql://localhost:5432/MY_DATABASE
username=user
password=pass
referenceUrl=jdbc:postgresql://localhost:5432/MY_DATABASE
referenceUsername=user
referencePassword=pass

Reference Database: postgres @ jdbc:postgresql://localhost:5432/MY_DATABASE (Default Schema: public)
Comparison Database: postgres @ jdbc:postgresql://localhost:5432/MY_DATABASE (Default Schema: public)

[...]

Missing Unique Constraint(s):
     email_type_lang_mandant_unique on emailentity(belongsto_userid, emailtype, language)
     filecard_delivery_source_unique on filecardentity(assignmentdelivery_id, original_cardid)
     lesson_delivery_source_unique on lessonentity(assignmentdelivery_id, sourcelesson_lessonid)
     link_type_lang_mandant_unique on linkentity(belongsto_userid, linktype, language)

     [...]

Liquibase 'diff' Successful