"attempts" field is invalid in concourse version 7.7.1

Question

in concourse 7.7.1, When I setup the pipeline

plan: - {get: abc, trigger: true} - get: ttt - get: library_cache - in_parallel: - {task: build-frontend, file: ttt/ci/tasks/build.yml, privileged: true, params: {TARGET_CFG: ((gamma)), SERVICE: frontend}, attempts:2} - {task: build-backend, file: ttt/ci/tasks/build.yml, privileged: true, params: {TARGET_CFG: ((gamma)), SERVICE: backend}, attempts:2} - {task: build-worker, file: ttt/ci/tasks/build.yml, privileged: true, params: {TARGET_CFG: ((gamma)), SERVICE: worker}, attempts:2}

I got the below error:

error: invalid pipeline config:
invalid jobs:
    jobs.build-xyz.plan.do[3].in_parallel.steps[0]: unknown fields ["attempts:2"]
    jobs.build-xyz.plan.do[3].in_parallel.steps[1]: unknown fields ["attempts:2"]
    jobs.build-xyz.plan.do[3].in_parallel.steps[2]: unknown fields ["attempts:2"]

In my pipeline config: I replaced "limit" in place of "attempts" but same issue

error: invalid pipeline config:
invalid jobs:
    jobs.build-xyz.plan.do[3].in_parallel.steps[0]: unknown fields ["limit:2"]
    jobs.build-xyz.plan.do[3].in_parallel.steps[1]: unknown fields ["limit:2"]
    jobs.build-xyz.plan.do[3].in_parallel.steps[2]: unknown fields ["limit:2"]