I turned on the schema creation because some on my tables have hardcoded schemas but those that don't have seem to be considered as well leading to following exception

org.h2.jdbc.JdbcSQLException: Syntax error in SQL statement "CREATE SCHEMA NULL[*] "; expected "identifier"; SQL statement:
create schema null [42001-176]

As a workaround I edited the CreateSchemaCommandSource not to invoke (H2) dialects getCreateSchemaCommand when schema is not present.