Too many conversation webhooks

The limit for conversation-scoped webhooks is five; this request would have created a sixth, and is thus rejected.

You may have forgotten to remove other webhooks before adding this one. Alternatively, your use-case may include scenarios requiring more than five.

• Retrieve a list of the existing webhooks for this conversation and remove the ones that are redundant or obsolete.
• Consider combining some of the existing webhooks and forward events to a single destination.
• Consider using global webhooks instead of conversation-scoped hooks.