diff --git a/kernel/api/filetree.go b/kernel/api/filetree.go
index 0ced25576..357b2ce19 100644
--- a/kernel/api/filetree.go
+++ b/kernel/api/filetree.go
@@ -612,6 +612,9 @@ func getDocCreateSavePath(c *gin.Context) {
 	if "../" == docCreateSavePathTpl {
 		docCreateSavePathTpl = "../Untitled"
 	}
+	if "/" == docCreateSavePathTpl {
+		docCreateSavePathTpl = "/Untitled"
+	}
 
 	p, err := model.RenderGoTemplate(docCreateSavePathTpl)
 	if nil != err {
diff --git a/kernel/api/notebook.go b/kernel/api/notebook.go
index 67c44fe9b..96eac7ea6 100644
--- a/kernel/api/notebook.go
+++ b/kernel/api/notebook.go
@@ -329,6 +329,9 @@ func setNotebookConf(c *gin.Context) {
 	if "../" == boxConf.DocCreateSavePath {
 		boxConf.DocCreateSavePath = "../Untitled"
 	}
+	if "/" == boxConf.DocCreateSavePath {
+		boxConf.DocCreateSavePath = "/Untitled"
+	}
 
 	box.SaveConf(boxConf)
 	ret.Data = boxConf
diff --git a/kernel/api/setting.go b/kernel/api/setting.go
index 126966952..b3d85c858 100644
--- a/kernel/api/setting.go
+++ b/kernel/api/setting.go
@@ -398,6 +398,9 @@ func setFiletree(c *gin.Context) {
 	if "../" == fileTree.DocCreateSavePath {
 		fileTree.DocCreateSavePath = "../Untitled"
 	}
+	if "/" == fileTree.DocCreateSavePath {
+		fileTree.DocCreateSavePath = "/Untitled"
+	}
 
 	if 1 > fileTree.MaxOpenTabCount {
 		fileTree.MaxOpenTabCount = 8
diff --git a/kernel/av/table.go b/kernel/av/table.go
index 711ca6cf9..c38922c0a 100644
--- a/kernel/av/table.go
+++ b/kernel/av/table.go
@@ -17,6 +17,7 @@
 package av
 
 import (
+	"bytes"
 	"math"
 	"sort"
 	"strconv"
@@ -210,8 +211,19 @@ func (value *Value) Compare(other *Value) int {
 		}
 	case KeyTypeRollup:
 		if nil != value.Rollup && nil != other.Rollup {
-			vContent := strings.TrimSpace(strings.Join(value.Relation.Contents, " "))
-			oContent := strings.TrimSpace(strings.Join(other.Relation.Contents, " "))
+			vContentBuf := bytes.Buffer{}
+			for _, c := range value.Rollup.Contents {
+				vContentBuf.WriteString(c.String())
+				vContentBuf.WriteByte(' ')
+			}
+			vContent := strings.TrimSpace(vContentBuf.String())
+			oContentBuf := bytes.Buffer{}
+			for _, c := range other.Rollup.Contents {
+				oContentBuf.WriteString(c.String())
+				oContentBuf.WriteByte(' ')
+			}
+			oContent := strings.TrimSpace(oContentBuf.String())
+
 			if util.IsNumeric(vContent) && util.IsNumeric(oContent) {
 				v1, _ := strconv.ParseFloat(vContent, 64)
 				v2, _ := strconv.ParseFloat(oContent, 64)
diff --git a/kernel/model/conf.go b/kernel/model/conf.go
index 1928fdb51..f6784af0c 100644
--- a/kernel/model/conf.go
+++ b/kernel/model/conf.go
@@ -208,6 +208,9 @@ func InitConf() {
 	if "../" == Conf.FileTree.DocCreateSavePath {
 		Conf.FileTree.DocCreateSavePath = "../Untitled"
 	}
+	if "/" == Conf.FileTree.DocCreateSavePath {
+		Conf.FileTree.DocCreateSavePath = "/Untitled"
+	}
 	util.UseSingleLineSave = Conf.FileTree.UseSingleLineSave
 
 	util.CurrentCloudRegion = Conf.CloudRegion