Missing auto generated constraint names on h2 ddl

hibernate 6.4.4.Final/h2 2.2.224 generates: create table "point" ... unique ("number", "parent_version_identifier"), unique ("code", "parent_version_identifier"))
hibernate 6.2.13.Final/h2 2.2.214 generates create table "point" ... constraint "UK1234566" unique ("number", "parent_version_identifier"), constraint "UK123456safseef6" unique ("code", "parent_version_identifier"))

i expect hibernate to still generate the constraint names when using auto update

can someone point me to pull request or commit which introduced this breaking change?

How come you think this is a breaking change? We simply omit unique constraint names instead of generating a name. You should be using an explicit name if you care about this.