From b3b6e2a42229bc64a647837cd5eb68f8b833a2a4 Mon Sep 17 00:00:00 2001
From: Erik Grinaker <erik@interchain.berlin>
Date: Mon, 14 Dec 2020 13:11:40 +0100
Subject: [PATCH] check version<0 in deleteVersion (#348)

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

diff --git a/mutable_tree.go b/mutable_tree.go
index d29f6754e..cac8a0bb8 100644
--- a/mutable_tree.go
+++ b/mutable_tree.go
@@ -516,7 +516,7 @@ func (tree *MutableTree) SaveVersion() ([]byte, int64, error) {
 }
 
 func (tree *MutableTree) deleteVersion(version int64) error {
-	if version == 0 {
+	if version <= 0 {
 		return errors.New("version must be greater than 0")
 	}
 	if version == tree.version {