From d4df15721d75f4a6a49e399f2f2266a07db5c2f3 Mon Sep 17 00:00:00 2001
From: "Jason E. Aten" <jason.aten@molecula.com>
Date: Thu, 29 Oct 2020 02:41:09 +0000
Subject: [PATCH] allow migration of empty to empty

---
 txfactory.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/txfactory.go b/txfactory.go
index 0e44579e3..3309884e6 100644
--- a/txfactory.go
+++ b/txfactory.go
@@ -1327,7 +1327,7 @@ func (f *TxFactory) green2blue(holder *Holder) (err error) {
 	if err != nil {
 		return errors.Wrap(err, "TxFactory.green2blue f.greenHasData()")
 	}
-	if !greenHasData {
+	if blueHasData && !greenHasData {
 		holder.Logger.Printf("error: cannot migrate from green '%v' because it has no data in it.", greenSrc)
 		return fmt.Errorf("error: cannot migrate from green '%v' because it has no data in it.", greenSrc)
 	}