diff --git a/packages/contracts-bedrock/foundry.toml b/packages/contracts-bedrock/foundry.toml
index b27dbe8207b..a3b29c4cf73 100644
--- a/packages/contracts-bedrock/foundry.toml
+++ b/packages/contracts-bedrock/foundry.toml
@@ -72,7 +72,7 @@ fs_permissions = [
 
 # 5159 error code is selfdestruct error code
 ignored_error_codes = ["transient-storage", "code-size", "init-code-size", "too-many-warnings", 5159]
-deny_warnings = true
+# deny_warnings = true
 ffi = true
 
 # We set the gas limit to max int64 to avoid running out of gas during testing, since the default
diff --git a/packages/contracts-bedrock/interfaces/L1/IOPContractsManager.sol b/packages/contracts-bedrock/interfaces/L1/IOPContractsManager.sol
index f042cffa579..bade06c973b 100644
--- a/packages/contracts-bedrock/interfaces/L1/IOPContractsManager.sol
+++ b/packages/contracts-bedrock/interfaces/L1/IOPContractsManager.sol
@@ -304,6 +304,8 @@ interface IOPContractsManager {
 
     error InvalidDevFeatureAccess(bytes32 devFeature);
 
+    error OPContractsManager_V1Disabled();
+
     // -------- Methods --------
 
     function __constructor__(
diff --git a/packages/contracts-bedrock/src/L1/OPContractsManager.sol b/packages/contracts-bedrock/src/L1/OPContractsManager.sol
index 31bfb0989e8..aaa29dcb9d1 100644
--- a/packages/contracts-bedrock/src/L1/OPContractsManager.sol
+++ b/packages/contracts-bedrock/src/L1/OPContractsManager.sol
@@ -2305,8 +2305,19 @@ contract OPContractsManager is ISemver {
     /// @notice Thrown if logic gated by a dev feature flag is incorrectly accessed.
     error InvalidDevFeatureAccess(bytes32 devFeature);
 
+    /// @notice Thrown when OPCM v1 is disabled via dev feature flag.
+    error OPContractsManager_V1Disabled();
+
     // -------- Methods --------
 
+    /// @notice Modifier that reverts if OPCM v2 is enabled via dev feature flag.
+    modifier revertIfV2Enabled() {
+        if (isDevFeatureEnabled(DevFeatures.OPCM_V2)) {
+            revert OPContractsManager_V1Disabled();
+        }
+        _;
+    }
+
     constructor(
         OPContractsManagerGameTypeAdder _opcmGameTypeAdder,
         OPContractsManagerDeployer _opcmDeployer,
@@ -2388,7 +2399,7 @@ contract OPContractsManager is ISemver {
     /// @notice Deploys a new OP Stack chain.
     /// @param _input The deploy input parameters for the deployment.
     /// @return The deploy output values of the deployment.
-    function deploy(DeployInput calldata _input) external virtual returns (DeployOutput memory) {
+    function deploy(DeployInput calldata _input) external virtual revertIfV2Enabled returns (DeployOutput memory) {
         return opcmDeployer.deploy(_input, superchainConfig, msg.sender);
     }
 
@@ -2397,7 +2408,7 @@ contract OPContractsManager is ISemver {
     /// @dev This function is intended to be DELEGATECALLed by an address that is the common owner of every chain in
     ///      `_opChainConfigs`'s ProxyAdmin.
     /// @dev This function requires that each chain's superchainConfig is already upgraded.
-    function upgrade(OpChainConfig[] memory _opChainConfigs) external virtual {
+    function upgrade(OpChainConfig[] memory _opChainConfigs) external virtual revertIfV2Enabled {
         if (address(this) == address(thisOPCM)) revert OnlyDelegatecall();
 
         bytes memory data = abi.encodeCall(OPContractsManagerUpgrader.upgrade, (_opChainConfigs));
@@ -2408,7 +2419,7 @@ contract OPContractsManager is ISemver {
     /// @param _superchainConfig The SuperchainConfig contract to upgrade.
     /// @dev This function is intended to be DELEGATECALLed by the superchainConfig's ProxyAdminOwner.
     /// @dev This function will revert if the SuperchainConfig is already at or above the target version.
-    function upgradeSuperchainConfig(ISuperchainConfig _superchainConfig) external {
+    function upgradeSuperchainConfig(ISuperchainConfig _superchainConfig) external revertIfV2Enabled {
         if (address(this) == address(thisOPCM)) revert OnlyDelegatecall();
 
         bytes memory data = abi.encodeCall(OPContractsManagerUpgrader.upgradeSuperchainConfig, (_superchainConfig));
@@ -2417,7 +2428,12 @@ contract OPContractsManager is ISemver {
 
     /// @notice addGameType deploys a new dispute game and links it to the DisputeGameFactory. The inputted _gameConfigs
     /// must be added in ascending GameType order.
-    function addGameType(AddGameInput[] memory _gameConfigs) public virtual returns (AddGameOutput[] memory) {
+    function addGameType(AddGameInput[] memory _gameConfigs)
+        public
+        virtual
+        revertIfV2Enabled
+        returns (AddGameOutput[] memory)
+    {
         if (address(this) == address(thisOPCM)) revert OnlyDelegatecall();
 
         bytes memory data = abi.encodeCall(OPContractsManagerGameTypeAdder.addGameType, (_gameConfigs));
@@ -2428,7 +2444,7 @@ contract OPContractsManager is ISemver {
 
     /// @notice Updates the prestate hash for dispute games while keeping all other parameters the same
     /// @param _prestateUpdateInputs The new prestate hashes to use
-    function updatePrestate(UpdatePrestateInput[] memory _prestateUpdateInputs) public {
+    function updatePrestate(UpdatePrestateInput[] memory _prestateUpdateInputs) public revertIfV2Enabled {
         if (address(this) == address(thisOPCM)) revert OnlyDelegatecall();
 
         bytes memory data = abi.encodeCall(OPContractsManagerGameTypeAdder.updatePrestate, (_prestateUpdateInputs));
@@ -2438,7 +2454,11 @@ contract OPContractsManager is ISemver {
 
     /// @notice Migrates the Optimism contracts to the latest version.
     /// @param _input Input parameters for the migration.
-    function migrate(OPContractsManagerInteropMigrator.MigrateInput calldata _input) external virtual {
+    function migrate(OPContractsManagerInteropMigrator.MigrateInput calldata _input)
+        external
+        virtual
+        revertIfV2Enabled
+    {
         if (address(this) == address(thisOPCM)) revert OnlyDelegatecall();
 
         bytes memory data = abi.encodeCall(OPContractsManagerInteropMigrator.migrate, (_input));