public static function create_user_evidence_competency($userevidenceorid, $competencyid) {
        global $USER;
        static::require_enabled();

        $userevidence = $userevidenceorid;
        if (!is_object($userevidence)) {
            $userevidence = self::read_user_evidence($userevidence);
        }

        // Perform user evidence capability checks.
        if (!$userevidence->can_manage()) {
            $context = $userevidence->get_context();
            throw new required_capability_exception($context, 'moodle/competency:userevidencemanage', 'nopermissions', '');
        }

        // Perform competency capability checks.
        $competency = self::read_competency($competencyid);

        // Get (and create) the relation.
        $relation = user_evidence_competency::get_relation($userevidence->get('id'), $competency->get('id'));
        if (!$relation->get('id')) {
            $relation->create();

            $link = url::user_evidence($userevidence->get('id'));
            self::add_evidence(
                $userevidence->get('userid'),
                $competency,
                $userevidence->get_context(),
                evidence::ACTION_LOG,
                'evidence_evidenceofpriorlearninglinked',
                'core_competency',
                $userevidence->get('name'),
                false,
                $link->out(false),
                null,
                $USER->id
            );
        }

        return $relation;
    }