diff --git a/neo/Consensus/ConsensusContext.cs b/neo/Consensus/ConsensusContext.cs
index 4574d70f7e..f96409318a 100644
--- a/neo/Consensus/ConsensusContext.cs
+++ b/neo/Consensus/ConsensusContext.cs
@@ -19,9 +19,9 @@ namespace Neo.Consensus
     internal class ConsensusContext : IDisposable, ISerializable
     {
         /// <summary>
-        /// Prefix for saving consensus state.
+        /// Key for saving consensus state.
         /// </summary>
-        public const byte CN_Context = 0xf4;
+        private static readonly byte[] ConsensusStateKey = { 0xf4 };
 
         public Block Block;
         public byte ViewNumber;
@@ -143,7 +143,7 @@ public uint GetPrimaryIndex(byte viewNumber)
 
         public bool Load()
         {
-            byte[] data = store.Get(CN_Context, new byte[0]);
+            byte[] data = store.Get(ConsensusStateKey);
             if (data is null || data.Length == 0) return false;
             using (MemoryStream ms = new MemoryStream(data, false))
             using (BinaryReader reader = new BinaryReader(ms))
@@ -401,7 +401,7 @@ public void Reset(byte viewNumber)
 
         public void Save()
         {
-            store.PutSync(CN_Context, new byte[0], this.ToArray());
+            store.PutSync(ConsensusStateKey, this.ToArray());
         }
 
         public void Serialize(BinaryWriter writer)
diff --git a/neo/Persistence/LevelDB/LevelDBStore.cs b/neo/Persistence/LevelDB/LevelDBStore.cs
index bb6ac26698..805c1fe915 100644
--- a/neo/Persistence/LevelDB/LevelDBStore.cs
+++ b/neo/Persistence/LevelDB/LevelDBStore.cs
@@ -34,9 +34,9 @@ public void Dispose()
             db.Dispose();
         }
 
-        public override byte[] Get(byte prefix, byte[] key)
+        public override byte[] Get(byte[] key)
         {
-            if (!db.TryGet(ReadOptions.Default, SliceBuilder.Begin(prefix).Add(key), out Slice slice))
+            if (!db.TryGet(ReadOptions.Default, key, out Slice slice))
                 return null;
             return slice.ToArray();
         }
@@ -81,14 +81,14 @@ public override MetaDataCache<HashIndexState> GetHeaderHashIndex()
             return new DbMetaDataCache<HashIndexState>(db, null, null, Prefixes.IX_CurrentHeader);
         }
 
-        public override void Put(byte prefix, byte[] key, byte[] value)
+        public override void Put(byte[] key, byte[] value)
         {
-            db.Put(WriteOptions.Default, SliceBuilder.Begin(prefix).Add(key), value);
+            db.Put(WriteOptions.Default, key, value);
         }
 
-        public override void PutSync(byte prefix, byte[] key, byte[] value)
+        public override void PutSync(byte[] key, byte[] value)
         {
-            db.Put(new WriteOptions { Sync = true }, SliceBuilder.Begin(prefix).Add(key), value);
+            db.Put(new WriteOptions { Sync = true }, key, value);
         }
     }
 }
diff --git a/neo/Persistence/Store.cs b/neo/Persistence/Store.cs
index 3dc7127f3a..eab5c182b9 100644
--- a/neo/Persistence/Store.cs
+++ b/neo/Persistence/Store.cs
@@ -14,7 +14,7 @@ public abstract class Store : IPersistence
         MetaDataCache<HashIndexState> IPersistence.BlockHashIndex => GetBlockHashIndex();
         MetaDataCache<HashIndexState> IPersistence.HeaderHashIndex => GetHeaderHashIndex();
 
-        public abstract byte[] Get(byte prefix, byte[] key);
+        public abstract byte[] Get(byte[] key);
         public abstract DataCache<UInt256, TrimmedBlock> GetBlocks();
         public abstract DataCache<UInt256, TransactionState> GetTransactions();
         public abstract DataCache<UInt160, ContractState> GetContracts();
@@ -22,8 +22,8 @@ public abstract class Store : IPersistence
         public abstract DataCache<UInt32Wrapper, HeaderHashList> GetHeaderHashList();
         public abstract MetaDataCache<HashIndexState> GetBlockHashIndex();
         public abstract MetaDataCache<HashIndexState> GetHeaderHashIndex();
-        public abstract void Put(byte prefix, byte[] key, byte[] value);
-        public abstract void PutSync(byte prefix, byte[] key, byte[] value);
+        public abstract void Put(byte[] key, byte[] value);
+        public abstract void PutSync(byte[] key, byte[] value);
 
         public abstract Snapshot GetSnapshot();
     }