Issue Summary

When copying a Incoming Webhook triggered rule, Jira keeps using as reference the same webhook URL even though the trigger in the copy is changed

Steps to Reproduce

1. Create Rule 1 using Incoming Webhook trigger
2. Create a Rule 2 by copying Rule 1 (using .... > copy)
3. Change the trigger of Rule 2 to Manual trigger
4. Try to edit Rule 1 by adding any new component to it. Jira won't let you save it and will show you the following error:

The incoming webhook URL is already in use by another trigger. Please regenerate! 

Please see a quick video in which the behavior is reproduced: https://share.getcloudapp.com/P8u6gQoX

Expected Results

Since Rule 2 trigger was updated, the webhook reference should not be considered anymore.

Actual Results

Jira considers that the same webhook is being used by 2 rules at the same time and this makes webhook not to trigger Rule 1 anymore.

Workaround

Change Rule 2 trigger to Incoming Webhook, what will make Jira to regenerate a new webhook URL. After that, it'll be possible to update the trigger to Manual trigger again.