diff --git a/kernel/model/backlink.go b/kernel/model/backlink.go
index 534c2de82..2fbb899c2 100644
--- a/kernel/model/backlink.go
+++ b/kernel/model/backlink.go
@@ -573,18 +573,15 @@ func buildLinkRefs(defRootID string, refs []*sql.Ref, keywords []string) (ret []
 	}
 
 	parentRefParagraphs := map[string]*Block{}
+	var paragraphParentIDs []string
 	for _, link := range links {
 		for _, ref := range link.Refs {
 			if "NodeParagraph" == ref.Type {
 				parentRefParagraphs[ref.ParentID] = ref
+				paragraphParentIDs = append(paragraphParentIDs, ref.ParentID)
 			}
 		}
 	}
-
-	var paragraphParentIDs []string
-	for parentID := range parentRefParagraphs {
-		paragraphParentIDs = append(paragraphParentIDs, parentID)
-	}
 	sqlParagraphParents := sql.GetBlocks(paragraphParentIDs)
 	paragraphParents := fromSQLBlocks(&sqlParagraphParents, "", 12)
 
diff --git a/kernel/model/blockinfo.go b/kernel/model/blockinfo.go
index 222488117..fe49373a6 100644
--- a/kernel/model/blockinfo.go
+++ b/kernel/model/blockinfo.go
@@ -567,16 +567,13 @@ func buildBacklinkListItemRefs(refIDs []string) (retRefIDs []string, originalRef
 	refBlocks := fromSQLBlocks(&sqlRefBlocks, "", 12)
 
 	parentRefParagraphs := map[string]*Block{}
+	var paragraphParentIDs []string
 	for _, ref := range refBlocks {
 		if nil != ref && "NodeParagraph" == ref.Type {
 			parentRefParagraphs[ref.ParentID] = ref
+			paragraphParentIDs = append(paragraphParentIDs, ref.ParentID)
 		}
 	}
-
-	var paragraphParentIDs []string
-	for parentID := range parentRefParagraphs {
-		paragraphParentIDs = append(paragraphParentIDs, parentID)
-	}
 	sqlParagraphParents := sql.GetBlocks(paragraphParentIDs)
 	paragraphParents := fromSQLBlocks(&sqlParagraphParents, "", 12)