我正在使用Arrow 1.2.0-RC中的新parZipOrAccumulate函数来并行化两个调用，并累积它们的错误（如果有的话）：

private suspend fun getUser(legalId: UserLegalId): Either<ApplicationError, User>

private suspend fun getDepartment(departmentCode: DepartmentCode): Either<ApplicationError, Department>

override suspend fun execute(param: AddUserToDepartmentInfo): Either<Nel<ApplicationError>, Department> = either {
            val pair: Pair<User, Department> =
                parZipOrAccumulate<ApplicationError, User, Department, Pair<User, Department>>(
                    {e1: ApplicationError, e2 : ApplicationError-> nonEmptyListOf(e1,e2)},
                    { getUser(param.userLegalId).bind() },
                    { getDepartment(param.departmentCode).bind() }
                ) { a, b -> Pair(a, b) }
            saveUserDrivenPort.save(pair.first.copy(departmentId = param.departmentCode)).bind()
            pair.second
        }

上面代码中的三个.bind()调用都不能编译，因为它期望错误类型匹配（x1m2 n1<->xx 1 m3n1x）。
当我需要用ApplicationError绑定可能失败的函数时，如何在Nel<ApplicationError>中积累错误？