Is not an error is a normal behavior by Hibernate creating these temps table if you use sequence with allocationSize greather than 1.

As they said allocationSize with value equals to 1 causes lack of performance this is the reasons wy the default is 50.

Anyway starting from Hibernate 6.2.0 CR1 you can disable the creation of these tables with:

hibernate.hql.bulk_id_strategy.global_temporary.create_tables=false

but seems is not a good practice.

more info here.

Hope helps.