Documentation : PUT /runtime/process-instances/{processInstanceId}/variables/{variableName}

[chouchou59]

This endpoint documentation seems incoherent :
"Nonexistent variables are created on the process-instance and existing ones are overridden without any error."
But error 404:
"Indicates the requested process instance was not found or the process instance does not have a variable with the given name. Status description contains additional information about the error."

So what is the exepected behavior if the variable doesn't exists yet: sucess or 404?
Actual test with a PUT gives me a 404

{
  "message": "Not found",
  "exception": "Execution 'ee2a8b4d-6e06-11f0-ac9e-0250f2b11700' does not have a variable with name: 'TOTO'."
}

https://github.com/flowable/flowable-engine/blob/0d94dd4964ab6567bced46bf16f1d2b24105e004/modules/flowable-rest/src/main/java/org/flowable/rest/service/api/runtime/process/ProcessInstanceVariableResource.java#L76C5-L76C115

   @ApiOperation(value = "Update a single variable on a process instance", tags = { "Process Instance Variables" }, nickname = "updateProcessInstanceVariable",
            notes = "This endpoint can be used in 2 ways: By passing a JSON Body (RestVariable) or by passing a multipart/form-data Object.\n"
                    + "Nonexistent variables are created on the process-instance and existing ones are overridden without any error.\n"
                    + "Note that scope is ignored, only local variables can be set in a process instance.\n"
                    + "NB: Swagger V2 specification does not support this use case that is why this endpoint might be buggy/incomplete if used with other tools.")
    @ApiImplicitParams({
            @ApiImplicitParam(name = "body", type = "org.flowable.rest.service.api.engine.variable.RestVariable", value = "Create a variable on a process instance", paramType = "body", example = "{\n" +
                    "    \"name\":\"intProcVar\"\n" +
                    "    \"type\":\"integer\"\n" +
                    "    \"value\":123,\n" +
                    " }"),
            @ApiImplicitParam(name = "file", dataType = "file", paramType = "form"),
            @ApiImplicitParam(name = "name", dataType = "string", paramType = "form", example = "Simple content item"),
            @ApiImplicitParam(name = "type", dataType = "string", paramType = "form", example = "integer"),
    })
    @ApiResponses(value = {
            @ApiResponse(code = 201, message = "Indicates both the process instance and variable were found and variable is updated."),
            @ApiResponse(code = 404, message = "Indicates the requested process instance was not found or the process instance does not have a variable with the given name. Status description contains additional information about the error.")
    })
    @PutMapping(value = "/runtime/process-instances/{processInstanceId}/variables/{variableName}", produces = "application/json", consumes = {"application/json", "multipart/form-data"})
    public RestVariable updateVariable(@ApiParam(name = "processInstanceId") @PathVariable("processInstanceId") String processInstanceId, @ApiParam(name = "variableName") @PathVariable("variableName") String variableName,