diff --git a/node/modules/slashfilter/slashfilter.go b/node/modules/slashfilter/slashfilter.go
index 22964f3..cb1643d 100644
--- a/node/modules/slashfilter/slashfilter.go
+++ b/node/modules/slashfilter/slashfilter.go
@@ -24,16 +24,16 @@ type mysqlSlashFilter struct {
 }
 
 type MinedBlock struct {
-	ParentEpoch int64  `gorm:"column:parent_epoch;type:bigint(20);NOT NULL"`
-	ParentKey   string `gorm:"column:parent_key;type:varchar(2048);NOT NULL"`
+	ParentEpoch int64  `gorm:"column:parent_epoch;type:bigint(20);default:0;NOT NULL"`
+	ParentKey   string `gorm:"column:parent_key;type:varchar(2048);default:'';NOT NULL"`
 
 	Epoch int64  `gorm:"column:epoch;type:bigint(20);NOT NULL;primary_key"`
 	Miner string `gorm:"column:miner;type:varchar(256);NOT NULL;primary_key"`
 	Cid   string `gorm:"column:cid;type:varchar(256);default:''"`
 
-	WinningAt time.Time   `gorm:"column:winning_at;type:datetime;NOT NULL"`
+	WinningAt time.Time   `gorm:"column:winning_at;type:datetime"`
 	MineState StateMining `gorm:"column:mine_state;type:tinyint(4);default:0;comment:0-mining,1-success,2-timeout,3-chain forked,4-error;NOT NULL"`
-	Consuming int64       `gorm:"column:consuming;type:bigint(10);NOT NULL"` // reserved
+	Consuming int64       `gorm:"column:consuming;type:bigint(10);default:0;NOT NULL"` // reserved
 }
 
 func (m *MinedBlock) TableName() string {