diff --git a/kernel/model/block.go b/kernel/model/block.go
index 8dc749a0f..ee3dbfa87 100644
--- a/kernel/model/block.go
+++ b/kernel/model/block.go
@@ -130,12 +130,11 @@ func GetBlockSiblingID(id string) (parent, previous, next string) {
 	}
 
 	parentListCount := 0
-	var parentList, parentListItem, current *ast.Node
+	var parentListItem, current *ast.Node
 	for p := node.Parent; nil != p; p = p.Parent {
 		if ast.NodeListItem == p.Type {
 			parentListCount++
 			if 1 < parentListCount {
-				parentList = p.Parent
 				parentListItem = p
 				break
 			}
@@ -143,9 +142,9 @@ func GetBlockSiblingID(id string) (parent, previous, next string) {
 		}
 	}
 
-	if nil != parentList {
-		parent = parentList.ID
-		if flb := firstChild(parentList); nil != flb {
+	if nil != parentListItem {
+		parent = parentListItem.ID
+		if flb := firstChild(parentListItem); nil != flb {
 			parent = flb.ID
 		}