diff --git a/contracts/core/Dispatcher.sol b/contracts/core/Dispatcher.sol
index d8afbcf8..f0c5590e 100644
--- a/contracts/core/Dispatcher.sol
+++ b/contracts/core/Dispatcher.sol
@@ -60,8 +60,6 @@ contract Dispatcher is Ownable2StepUpgradeable, UUPSUpgradeable, ReentrancyGuard
     mapping(address => mapping(bytes32 => mapping(uint64 => bool))) private _sendPacketCommitment;
     // keep track of received packets to prevent replay attack
     mapping(address => mapping(bytes32 => mapping(uint64 => bool))) private _recvPacketReceipt;
-    // keep track of outbound ack packets to prevent replay attack
-    mapping(address => mapping(bytes32 => mapping(uint64 => bool))) private _ackPacketCommitment;
 
     ILightClient _UNUSED; // From previous dispatcher version
     mapping(bytes32 => string) private _channelIdToConnection;
@@ -624,13 +622,6 @@ contract Dispatcher is Ownable2StepUpgradeable, UUPSUpgradeable, ReentrancyGuard
         } else {
             ack = AckPacket(false, data);
         }
-        bool hasAckPacketCommitment = _ackPacketCommitment[receiver][packet.dest.channelId][packet.sequence];
-        // check is not necessary for sync-acks
-        if (hasAckPacketCommitment) {
-            revert IBCErrors.ackPacketCommitmentAlreadyExists();
-        }
-
-        _ackPacketCommitment[receiver][packet.dest.channelId][packet.sequence] = true;
 
         emit WriteAckPacket(receiver, packet.dest.channelId, packet.sequence, ack);
     }
diff --git a/test/utils/Dispatcher.base.t.sol b/test/utils/Dispatcher.base.t.sol
index e5179c4a..279c3f40 100644
--- a/test/utils/Dispatcher.base.t.sol
+++ b/test/utils/Dispatcher.base.t.sol
@@ -55,6 +55,7 @@ contract Base is IbcEventsEmitter, ProofBase, TestUtilsTest {
 
     uint32 CONNECTION_TO_CLIENT_ID_STARTING_SLOT = 259;
     uint32 SEND_PACKET_COMMITMENT_STARTING_SLOT = 255;
+    uint32 CHANNEL_ID_TO_CONNECTION_STARTING_SLOT = 258;
     uint64 UINT64_MAX = 18_446_744_073_709_551_615;
     bytes32 PEPTIDE_CHAIN_ID = bytes32(uint256(444));
 
@@ -269,7 +270,7 @@ contract Base is IbcEventsEmitter, ProofBase, TestUtilsTest {
 
     // Store connection in channelid to connection mapping using store
     function _storeChannelidToConnectionMapping(bytes32 channelId, bytes32 connection) internal {
-        bytes32 chanIdToConnectionMapping = keccak256(abi.encode(channelId, uint32(259)));
+        bytes32 chanIdToConnectionMapping = keccak256(abi.encode(channelId, CHANNEL_ID_TO_CONNECTION_STARTING_SLOT));
         vm.store(address(dispatcherProxy), chanIdToConnectionMapping, connection);
     }