From 0f48f40cd7a4aac4ebb3c7ceb2c612fd1127fee6 Mon Sep 17 00:00:00 2001
From: Brannon King <countprimes@gmail.com>
Date: Thu, 30 Dec 2021 09:50:16 -0500
Subject: [PATCH] [lbry] work around existing bug with block validation flags

---
 blockchain/chain.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/blockchain/chain.go b/blockchain/chain.go
index 70f6e7a7..9a6ec216 100644
--- a/blockchain/chain.go
+++ b/blockchain/chain.go
@@ -1723,7 +1723,7 @@ func (b *BlockChain) reconsiderBlock(hash *chainhash.Hash) error {
 	}
 
 	// No need to reconsider, it is already valid.
-	if node.status.KnownValid() {
+	if node.status.KnownValid() && !node.status.KnownInvalid() { // second clause works around old bug
 		err := fmt.Errorf("block %s is already valid", hash)
 		return err
 	}