Symptoms
The Start button on the Create batch bookings page is disabled.
A red panel reads: "Cannot start a new batch — the following batch(es) are still creating bookings for some of these schedule entries:"
Cause
Another batch is currently in Confirming, Confirmed, or Creating status and would touch one or more of the same schedule-entry occurrences as the one you're trying to start. To avoid duplicate bookings, the system blocks the second batch from starting until the first one finishes.
Solution
Option 1: Wait for the in-flight batch
The simplest fix. Click the named batch in the red panel to open it; check the progress screen. Once it reaches a terminal state (Completed, Partially completed, Failed, or Cancelled), the block clears and you can start your new batch.
Option 2: Cancel the blocking batch
If the blocking batch is no longer wanted, open it and click Cancel. See Cancel or retry a booking-generation batch for what cancellation does in each phase.
After the blocking batch reaches a terminal state, return to the create page; the Start button will re-enable.
Option 3: Narrow your date range or team filter
If the overlap is small, you can sometimes work around the block by adjusting your filters so the new batch covers a different set of schedule entries. For example, if the blocking batch is creating bookings for Team A on 1–7 April, you can still start a separate batch for Team B on the same dates.
Prevention
Aim for one batch per (date range, team) combination at a time.
Wait for one batch to finish creating before starting another that overlaps.
The same block applies to Retry — if you retried a batch quickly after cancelling, the original may still be cleaning up.
Still having issues?
If you don't recognise the blocking batch, ask your team — it may have been started by another admin. You can see who started it under the Created by column on the Generate Bookings list.