使用 sqarql 更新具有空白节点的三元组时出现问题

Question

• 这是我的查询，此查询适用于没有空白节点的节点 但是在使用空白节点更新时出现了问题

  这些节点在更新后会重复 100 次

    DELETE {
    it:4D9AT21jAasfL9ah schema:description ?o_0 .
    it:4D9AT21jAasfL9ah it:hasArea ?o_1 .
    ?o_1 rdf:type ?o_1_0 .  ?o_1 schema:unitCode ?o_1_1 .
    ?o_1 schema:value ?o_1_2 .  ?o_1 schema:unitText ?o_1_3 .
    it:4D9AT21jAasfL9ah it:unresolvedWikidataType ?o_2 .
    it:4D9AT21jAasfL9ah schema:longitude ?o_3 .
    it:4D9AT21jAasfL9ah schema:addressCountry ?o_4 .
    it:4D9AT21jAasfL9ah rdfs:label ?o_5 .
    it:4D9AT21jAasfL9ah rdf:type ?o_6 .
    it:4D9AT21jAasfL9ah schema:url ?o_7 .
    it:4D9AT21jAasfL9ah it:wikiLink ?o_8 .
 }
    INSERT {
    it:4D9AT21jAasfL9ah  schema:description 'city and capital of Bali, Indonesia' . 
    it:4D9AT21jAasfL9ah  it:hasArea _:bQRrRFzX1zv9qUGWy . 
    _:bQRrRFzX1zv9qUGWy  rdf:type schema:QuantitativeValue; 
    schema:unitCode 'KMK'; 
    schema:value '123.98'; 
    schema:unitText 'km²' . 
    it:4D9AT21jAasfL9ah  it:unresolvedWikidataType 'Q3199141', 'Q13220204' . 
    it:4D9AT21jAasfL9ah  schema:longitude '115.21666666667' . 
    it:4D9AT21jAasfL9ah  schema:addressCountry it:WtC49aYLe8s0lsFC . 
    it:4D9AT21jAasfL9ah  rdfs:label 'Denpasar' . 
    it:4D9AT21jAasfL9ah  rdf:type schema:City . 
    it:4D9AT21jAasfL9ah  schema:url <http://www.denpasarkota.go.id/> . 
    it:4D9AT21jAasfL9ah  it:wikiLink <https://en.wikipedia.org/wiki/Denpasar> .
     }
     WHERE {
    it:4D9AT21jAasfL9ah ?p ?o .
    OPTIONAL {  it:4D9AT21jAasfL9ah schema:description ?o_0 }
    OPTIONAL {  it:4D9AT21jAasfL9ah it:hasArea ?o_1 }
    OPTIONAL {  ?o_1 rdf:type ?o_1_0 }
    OPTIONAL {  ?o_1 schema:unitCode ?o_1_1 }
    OPTIONAL {  ?o_1 schema:value ?o_1_2 }
    OPTIONAL {  ?o_1 schema:unitText ?o_1_3 }
    OPTIONAL {  it:4D9AT21jAasfL9ah it:unresolvedWikidataType ?o_2 }
    OPTIONAL {  it:4D9AT21jAasfL9ah schema:longitude ?o_3 }
    OPTIONAL {  it:4D9AT21jAasfL9ah schema:addressCountry ?o_4 }
    OPTIONAL {  it:4D9AT21jAasfL9ah rdfs:label ?o_5 }
    OPTIONAL {  it:4D9AT21jAasfL9ah rdf:type ?o_6 }
    OPTIONAL {  it:4D9AT21jAasfL9ah schema:url ?o_7 }
    OPTIONAL {  it:4D9AT21jAasfL9ah it:wikiLink ?o_8 }
 }

这是json格式的输出， 并且只有具有空白节点值的 hasArea 被重复多次

"schema:latitude": [
  "-7.164444444444444"
],
"it:hasArea": [
  {
    "rdf:type": [
      "schema:QuantitativeValue"
    ],
    "schema:unitCode": [
      "KMK"
    ],
    "schema:value": [
      "392.47"
    ],
    "schema:unitText": [
      "km²"
    ]
  },
  {
    "rdf:type": [
      "schema:QuantitativeValue"
    ],
    "schema:unitCode": [
      "KMK"
    ],
    "schema:value": [
      "392.47"
    ],
    "schema:unitText": [
      "km²"
    ]
  },
  {
    "rdf:type": [
      "schema:QuantitativeValue"
    ],
    "schema:unitCode": [
      "KMK"
    ],
    "schema:value": [
      "392.47"
    ],
    "schema:unitText": [
      "km²"
    ]
  },...
],
"rdfs:label": [
  "Denpasar"
],
...

提前致谢