VERSIONED_OBJECT.owner_id type in UML points to OBJECT_REF of a EHR.ehr_id, but it should be more generic, to that accomodates also VERSIONED_PARTY; see https://www.openehr.org/releases/RM/latest/docs/common/common.html#_overview_5

In description of class (the table on https://www.openehr.org/releases/RM/latest/docs/common/common.html#_versioned_object_class) this is correct:
"Reference to object to which this version container belongs, e.g. the id of the containing EHR or other relevant owning entity."