diff --git a/internal/web/blog/model/posts.go b/internal/web/blog/model/posts.go
index 22155c1..f5fb899 100644
--- a/internal/web/blog/model/posts.go
+++ b/internal/web/blog/model/posts.go
@@ -40,9 +40,9 @@ type Post struct {
 	// Hidden whether the post is hidden or not
 	Hidden bool `bson:"hidden" json:"hidden"`
 	// I18N internationalization of the post
-	I18N PostI18N `bson:"i18n" json:"i18n"`
+	I18N PostI18N `bson:"i18n" json:"i18n,omitempty"`
 	// Language language of the post content or markdown
-	Language string `bson:"-" json:"language"`
+	Language string `bson:"-" json:"language,omitempty"`
 	// ArweaveId arweave id of the post
 	ArweaveId []ArweaveHistoryItem `bson:"arweave_id" json:"arweave_id"`
 }
@@ -60,6 +60,10 @@ type legacyTime struct {
 }
 
 func (t legacyTime) Time() (time.Time, error) {
+	if t.Date == "" {
+		return time.Time{}, nil
+	}
+
 	return time.Parse(time.RFC3339, t.Date)
 }
 
@@ -115,9 +119,9 @@ type LegacyPost struct {
 	// Hidden whether the post is hidden or not
 	Hidden bool `bson:"hidden" json:"hidden"`
 	// I18N internationalization of the post
-	I18N legacyI18N `bson:"i18n" json:"i18n"`
+	I18N legacyI18N `bson:"i18n" json:"i18n,omitempty"`
 	// Language language of the post content or markdown
-	Language string `bson:"-" json:"language"`
+	Language string `bson:"-" json:"language,omitempty"`
 	// ArweaveId arweave id of the post
 	ArweaveId []ArweaveHistoryItem `bson:"arweave_id" json:"arweave_id"`
 }
diff --git a/internal/web/blog/service/posts.go b/internal/web/blog/service/posts.go
index 89f909f..6a5415a 100644
--- a/internal/web/blog/service/posts.go
+++ b/internal/web/blog/service/posts.go
@@ -193,7 +193,8 @@ func (s *Blog) LoadPostHistory(ctx context.Context, fileID string, language mode
 	}
 
 	post := new(model.Post)
-	if err = json.NewDecoder(reader).Decode(post); err != nil {
+	err = json.NewDecoder(reader).Decode(post)
+	if err != nil || post.Content == "" {
 		// try legacy struct
 		reader, err := makeReader(cnt)
 		if err != nil {
@@ -201,8 +202,8 @@ func (s *Blog) LoadPostHistory(ctx context.Context, fileID string, language mode
 		}
 
 		legacyPost := new(model.LegacyPost)
-		if err2 := json.NewDecoder(reader).Decode(legacyPost); err2 != nil {
-			return nil, errors.Wrap(errors.Join(err, err2), "cannot decode post by legacy struct")
+		if err = json.NewDecoder(reader).Decode(legacyPost); err != nil {
+			return nil, errors.Wrap(err, "cannot decode post by legacy struct")
 		}
 
 		if post, err = legacyPost.Post(); err != nil {