Error when deploying a new contract to Azure Blockchain Workbench - azure-blockchain-workbench

Question

When I try to deploy a sample contract to the Azure Blockchain Workbench:
The ContractUpdated call in function dispose of contract Contract has a parameter 'Only the contract owner can dispose of the contract.' which is a function name not defined in the set of functions for the workflow.
The text is actually a message in a require statement and has nothing to do with functions in workflows.
This is my contract:
pragma solidity ^0.4.24;
contract WorkbenchBase {
event WorkbenchContractCreated(string applicationName, string workflowName, address originatingAddress);
event WorkbenchContractUpdated(string applicationName, string workflowName, string action, address originatingAddress);
string internal ApplicationName;
string internal WorkflowName;
constructor(string memory applicationName, string memory workflowName) internal
{
ApplicationName = applicationName;
WorkflowName = workflowName;
}
function ContractCreated() internal
{
emit WorkbenchContractCreated(ApplicationName, WorkflowName, msg.sender);
}
function ContractUpdated(string memory action) internal
{
emit WorkbenchContractUpdated(ApplicationName, WorkflowName, action, msg.sender);
}
}
contract Contract is WorkbenchBase("Contract", "Contract")
{
enum StateType
{
New,
Disposed
}
address public owner;
StateType public state;
constructor() public
{
owner = msg.sender;
state = StateType.New;
ContractCreated();
}
function destroy() public
{
require(msg.sender == owner, "Only the contract owner can destroy the contract.");
selfdestruct(owner);
}
function dispose() public
{
require(msg.sender == owner, "Only the contract owner can dispose of the contract.");
state = StateType.Disposed;
ContractUpdated('dispose');
}
}
And this is my JSON file:
{
"Id": 1,
"ApplicationName": "Contract",
"DisplayName": "Contract",
"Description": "",
"ApplicationRoles": [
{
"Name": "Representative"
}
],
"Workflows": [
{
"Id": 1,
"Name": "Contract",
"DisplayName": "Contract",
"Initiators": [
"Representative"
],
"StartState": "New",
"Properties": [
{
"Id": 1,
"Name": "state",
"DisplayName": "State",
"Description": "Holds the state.",
"Type": {
"Name": "state"
}
},
{
"Id": 2,
"Name": "owner",
"DisplayName": "Owner",
"Description": "Holds the address of the owner of the contract.",
"Type": {
"Name": "address"
}
}
],
"Constructor": {
"Parameters": []
},
"Functions": [
{
"Id": "1",
"Name": "dispose",
"DisplayName": "Dispose",
"Description": "Disposes the contract.",
"Parameters": []
},
],
"States": [
{
"Id": 1,
"Name": "New",
"DisplayName": "New",
"PercentComplete": 0,
"Value": "New",
"Style": "Success",
"Transitions": [
{
"AllowedRoles": [
"Representative"
],
"AllowedInstanceRoles": [],
"Description": "Disposes the contract.",
"Function": "dispose",
"NextStates": [
"Disposed"
],
"DisplayName": "Dispose"
}
]
},
{
"Id": 100,
"Name": "Disposed",
"DisplayName": "Disposed",
"PercentComplete": 100,
"Value": "Disposed",
"Style": "Failure",
"Transitions": []
}
]
}
]
}
Is this a bug in Azure Blockchain Workbench or am I doing something wrong?