What happens to my payment gateways if my plan now allows fewer than I have set up?

Checkout keeps working. The gateways you already configured stay active, but you cannot add new ones until you are back within your plan.

To fix the warning:

1. Go to Store Settings → Payment Gateway.
2. In Payment Gateways, untick the gateways you no longer need. The counter shows how many are selected out of what your plan allows.
3. Click Save gateways.

If you need more gateways, use the Gateway Capacity card on the same page to buy extra capacity, or move to a larger plan. Cash on Delivery, Bank Transfer and UPI do not count towards this limit.