We have several events with the prefix "Firebase_" for irrelevant reasons. These events were successfully added to Google Analytics by sending them via mParticle.

We can view statistics for these events, but we cannot use them as goals for A/B tests. The UI displays the following error:
"Error: Error saving experiment: Can't validate experiment data."
The server response states:
"Cannot use reserved event name: '<event name>'."

The suggested workaround is to create new events with non-reserved names based on these existing events. However, there are limits on the number of events you can create, and this adds unnecessary work.

Since the error message is unclear and the workaround is not widely known, the ideal solution would be to allow A/B tests to use any event available in Google Analytics, regardless of its name.