What this means: You've submitted a record for a new worker with a postponement (deferral) date that hasn't arrived yet. Workers in active postponement shouldn't be enrolled until their deferral period ends.
What to do
If the worker is genuinely in postponement, they shouldn't be in this submission yet; speak to your payroll provider about restricting the export to only include eligible workers
If the deferral date is wrong, correct it in your payroll system and resubmit
If you can't restrict the export scope, contact Jarvis Support, as there may be a scheme setting that can help