From 506181599c218d3d8e43ee970cb12eb6742f68eb Mon Sep 17 00:00:00 2001
From: xjtdy888 <xjtdy888@163.com>
Date: Wed, 9 May 2018 14:57:42 +0800
Subject: [PATCH] lib/db: Remove all sequences related to the folder (fixes
 #4928) (#4929)

---
 lib/db/leveldb_dbinstance.go | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/db/leveldb_dbinstance.go b/lib/db/leveldb_dbinstance.go
index fa581b82..dc7c5ead 100644
--- a/lib/db/leveldb_dbinstance.go
+++ b/lib/db/leveldb_dbinstance.go
@@ -539,6 +539,14 @@ func (db *Instance) dropFolder(folder []byte) {
 	}
 	dbi.Release()
 
+	// Remove all sequences related to the folder
+	sequenceKey := db.sequenceKey([]byte(folder), 0)
+	dbi = t.NewIterator(util.BytesPrefix(sequenceKey[:4]), nil)
+	for dbi.Next() {
+		db.Delete(dbi.Key(), nil)
+	}
+	dbi.Release()
+
 	// Remove all items related to the given folder from the global bucket
 	dbi = t.NewIterator(util.BytesPrefix([]byte{KeyTypeGlobal}), nil)
 	for dbi.Next() {