Error: "To avoid accidental duplicate subscriptions, a short delay is required between subscriptions. If you are sure you want to subscribe this account to the same plan more than once, please wait 60 seconds before subscribing again. "

This error arises when multiple subscription requests are made within 60 seconds of one another. The 60 second delay is in place to ensure a previous subscription and transaction update into the account has completed before permitting the next subscription request.

To override the 60 second delay, it is possible to set a bulk flag on the first subscription to indicate to the system that additional subscription requests can be expected and not to delay 60 seconds before the next subscription request is processed.

The bulk parameter is discussed in the Recurly development documentation at https://dev.recurly.com/docs/create-subscription