diff --git a/db/sqlite3/model.go b/db/sqlite3/model.go
index 71f1bfb..29e1483 100644
--- a/db/sqlite3/model.go
+++ b/db/sqlite3/model.go
@@ -19,7 +19,7 @@ type StoredMessageAttribute struct {
 	ID         int64 // ID is the crc64 of 字段s below
 	MessageSeq int32
 	InternalID int32
-	SenderUin  int64
+	SenderUin  int64 // SenderUin is fk to UinInfo
 	Timestamp  int64
 }
 
@@ -28,7 +28,7 @@ type StoredGuildMessageAttribute struct {
 	ID           int64 // ID is the crc64 of 字段s below
 	MessageSeq   int64
 	InternalID   int64
-	SenderTinyID int64
+	SenderTinyID int64 // SenderTinyID is fk to TinyInfo
 	Timestamp    int64
 }
 
diff --git a/db/sqlite3/sqlite3.go b/db/sqlite3/sqlite3.go
index bcba4ed..3ff39bb 100644
--- a/db/sqlite3/sqlite3.go
+++ b/db/sqlite3/sqlite3.go
@@ -61,26 +61,46 @@ func (s *database) Open() error {
 	if err != nil {
 		return errors.Wrap(err, "create sqlite3 table error")
 	}
+	err = s.db.Insert(Sqlite3UinInfoTableName, &UinInfo{Name: "null"})
+	if err != nil {
+		return errors.Wrap(err, "insert into sqlite3 table "+Sqlite3UinInfoTableName+" error")
+	}
 	err = s.db.Create(Sqlite3TinyInfoTableName, &TinyInfo{})
 	if err != nil {
 		return errors.Wrap(err, "create sqlite3 table error")
 	}
+	err = s.db.Insert(Sqlite3TinyInfoTableName, &TinyInfo{Name: "null"})
+	if err != nil {
+		return errors.Wrap(err, "insert into sqlite3 table "+Sqlite3TinyInfoTableName+" error")
+	}
 	err = s.db.Create(Sqlite3MessageAttributeTableName, &StoredMessageAttribute{},
 		"FOREIGN KEY(SenderUin) REFERENCES "+Sqlite3UinInfoTableName+"(Uin)",
 	)
 	if err != nil {
 		return errors.Wrap(err, "create sqlite3 table error")
 	}
+	err = s.db.Insert(Sqlite3MessageAttributeTableName, &StoredMessageAttribute{})
+	if err != nil {
+		return errors.Wrap(err, "insert into sqlite3 table "+Sqlite3MessageAttributeTableName+" error")
+	}
 	err = s.db.Create(Sqlite3GuildMessageAttributeTableName, &StoredGuildMessageAttribute{},
 		"FOREIGN KEY(SenderTinyID) REFERENCES "+Sqlite3TinyInfoTableName+"(ID)",
 	)
 	if err != nil {
 		return errors.Wrap(err, "create sqlite3 table error")
 	}
+	err = s.db.Insert(Sqlite3GuildMessageAttributeTableName, &StoredGuildMessageAttribute{})
+	if err != nil {
+		return errors.Wrap(err, "insert into sqlite3 table "+Sqlite3GuildMessageAttributeTableName+" error")
+	}
 	err = s.db.Create(Sqlite3QuotedInfoTableName, &QuotedInfo{})
 	if err != nil {
 		return errors.Wrap(err, "create sqlite3 table error")
 	}
+	err = s.db.Insert(Sqlite3QuotedInfoTableName, &QuotedInfo{QuotedContent: "null"})
+	if err != nil {
+		return errors.Wrap(err, "insert into sqlite3 table "+Sqlite3QuotedInfoTableName+" error")
+	}
 	err = s.db.Create(Sqlite3GroupMessageTableName, &StoredGroupMessage{},
 		"FOREIGN KEY(AttributeID) REFERENCES "+Sqlite3MessageAttributeTableName+"(ID)",
 		"FOREIGN KEY(QuotedInfoID) REFERENCES "+Sqlite3QuotedInfoTableName+"(ID)",