I'm ignoring the org.hibernate.annotations.Index annotation since it's deprecated. Currently, if you have a unique column and something like the following, no index will be generated – only the unique constraint will be created (as it probably should be).

@Table( indexes = @Index(name = "payment_payment_formalid_idx", columnList = "formalId", unique = true) )

However, the "payment_payment_formalid_idx" name isn't used for the constraint. That might be the real fix.

Missing anything?