diff --git a/core/types/wo.go b/core/types/wo.go
index 003e34a0a0..578a33165f 100644
--- a/core/types/wo.go
+++ b/core/types/wo.go
@@ -1084,7 +1084,6 @@ type WorkObjectHeaderView struct {
 
 func (wo *WorkObject) ConvertToHeaderView() *WorkObjectHeaderView {
 	newWo := NewWorkObject(wo.woHeader, wo.woBody, wo.tx)
-	newWo.Body().SetExtTransactions(Transactions{})
 	newWo.Body().SetTransactions(Transactions{})
 	newWo.Body().SetManifest(BlockManifest{})
 	newWo.Body().SetInterlinkHashes(common.Hashes{})