feat: add test for creating account with same owner and index

test/foundry/unit/concrete/factory/TestK1ValidatorFactory_Deployments.t.sol

@@ -110,16 +110,18 @@ contract TestK1ValidatorFactory_Deployments is NexusTest_Base {
         assertEq(deployedAccountAddress, expectedAddress, "Computed address mismatch");
     }
 
-    /// @notice Tests that creating an account with the same owner and index results in the same address.
-    function test_CreateAccount_SameOwnerAndIndex() public payable {
-        uint256 index = 0;
-        address expectedOwner = user.addr;
+/// @notice Tests that creating an account with the same owner and index results in the same address.
+function test_CreateAccount_SameOwnerAndIndex() public payable {
+    uint256 index = 0;
+    address expectedOwner = user.addr;
 
-        address payable firstAccountAddress = validatorFactory.createAccount{ value: 1 ether }(expectedOwner, index, ATTESTERS, THRESHOLD);
-        address payable secondAccountAddress = validatorFactory.createAccount{ value: 1 ether }(expectedOwner, index, ATTESTERS, THRESHOLD);
+    // Create the first account with the given owner and index
+    address payable firstAccountAddress = validatorFactory.createAccount{ value: 1 ether }(expectedOwner, index, ATTESTERS, THRESHOLD);
 
-        assertEq(firstAccountAddress, secondAccountAddress, "Addresses should match for the same owner and index");
-    }
+    // Expect the second call to revert with InnerCallFailed
+    vm.expectRevert(K1ValidatorFactory.InnerCallFailed.selector);
+    address payable secondAccountAddress = validatorFactory.createAccount{ value: 1 ether }(expectedOwner, index, ATTESTERS, THRESHOLD);
+}
 
     /// @notice Tests that creating accounts with different indexes results in different addresses.
     function test_CreateAccount_DifferentIndexes() public payable {