diff --git a/CHANGES.md b/CHANGES.md
index b388556b429..780857939bd 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -28,8 +28,6 @@ To be released.
     parameter `IActionEvaluator actionEvaluator` any more.  [[#3811]]
  -  (Libplanet) `BlockChain.ProposeBlock()` receives parameter
     `HashDigest<SHA256> stateRootHash`.  [[#3811]]
- -  (Libplanet) Added `BlockChain.GetNextWorldState()` and
-    `BlockChain.GetNextWorldState(BlockHash?)` methods.  [[#3821]]
 
 ### Backward-incompatible network protocol changes
 
@@ -37,12 +35,6 @@ To be released.
 
 ### Added APIs
 
- -  (Libplanet.Store) Added `IStore.GetNextStateRootHash()` method.
-    [[#3811]]
- -  (Libplanet.Store) Added `IStore.PutNextStateRootHash()` method.
-    [[#3811]]
- -  (Libplanet.Store) Added `IStore.DeleteNextStateRootHash()` method.
-    [[#3811]]
  -  (Libplanet) Added `BlockChain.DetermineNextBlockStateRootHash()`
     method.  [[#3811]]
 
@@ -51,8 +43,6 @@ To be released.
  -  `BlockHeader.StateRootHash` now means state root hash calculated by
     `BlockChain.DetermineNextBlockStateRootHash(previousBlockHash)`.
     [[#Sloth]]
- -  `IBlockChainStates.GetWorldState(BlockHash)` now means the `IWorldState`
-    before state transition from the `Block`.  [[#3811]]
  -  `Context.ProcessHeightOrRoundUponRules()` now appends block asynchronously,
     as a manner of fire-and-forget.  [[#3808]]
 
diff --git a/Libplanet.Action/State/IBlockChainStates.cs b/Libplanet.Action/State/IBlockChainStates.cs
index 005c32eee3c..f7dbdd62929 100644
--- a/Libplanet.Action/State/IBlockChainStates.cs
+++ b/Libplanet.Action/State/IBlockChainStates.cs
@@ -22,8 +22,8 @@ public interface IBlockChainStates
         /// The <see cref="IWorldState"/> at <paramref name="offset"/>, which is the identical
         /// to what <see cref="Block.StateRootHash"/> of <paramref name="offset"/> indicates.
         /// </returns>
-        /// <exception cref="ArgumentException">Thrown when <paramref name="offset"/>
-        /// one of the following is true.
+        /// <exception cref="ArgumentException">Thrown when one of the following is true
+        /// for <paramref name="offset"/>.
         /// <list type="bullet">
         ///     <item><description>
         ///         Corresponding <see cref="Block"/> is not found in the <see cref="IStore"/>.
@@ -46,7 +46,7 @@ public interface IBlockChainStates
         /// <returns>
         /// The <see cref="IWorldState"/> with <paramref name="stateRootHash"/>.
         /// If <paramref name="stateRootHash"/> is <see langword="null"/>,
-        /// returns the hash of the empty state root.
+        /// returns an empty <see cref="IWorldState"/>.
         /// </returns>
         /// <exception cref="ArgumentException">Thrown when no <see cref="ITrie"/> with
         /// <paramref name="hash"/> as its state root hash is found.