Seams we have the same issue. See https://stackoverflow.com/questions/59843052/hibernate-cannot-handle-sequences-with-same-name-in-differen-schemas

For us this was working until Hibernate 5.4.7. With the upgrade to 5.4.10 we get errors because of duplicated squence names in differen schemas.

Hibernate: 5.4.10.Final
JVM: OpenJDK 11
OS: Windows 10
DB: Oracle 18c