field builder fix

dmp-backend/core/src/main/java/eu/eudat/model/builder/descriptionpropertiesdefinition/FieldBuilder.java

@@ -101,10 +101,19 @@ public class FieldBuilder extends BaseBuilder<Field, FieldEntity> {
                     },
                     Reference::getId);
         } else {
+            List<UUID> ids = new ArrayList<>();
+            for (FieldEntity field: data) {
+                if (field.getTextListValue() != null) {
+                    for (String value: field.getTextListValue()) {
+                        if (value != null && !ids.contains(value)) ids.add(UUID.fromString(value));
+                    }
+                }
+            }
             FieldSet clone = new BaseFieldSet(fields.getFields()).ensure(Reference._id);
-            ReferenceQuery q = this.queryFactory.query(ReferenceQuery.class).authorize(this.authorize).ids(data.stream().map(FieldEntity::getTextListValue).flatMap(List::stream).map(UUID::fromString).distinct().collect(Collectors.toList()));
-            itemMap = this.builderFactory.builder(ReferenceBuilder.class).authorize(this.authorize).asForeignKey(q, clone, Reference::getId);
+            ReferenceQuery q = this.queryFactory.query(ReferenceQuery.class).authorize(this.authorize).ids(ids);
+            itemMap = this.builderFactory.builder(ReferenceBuilder.class).authorize(this.authorize).asForeignKey(q, clone, Reference::getId);;
         }
+
         if (!fields.hasField(Reference._id)) {
             itemMap.forEach((id, item) -> {
                 if (item != null)