Sentry envelope error prevents removing default fields of "Issue" in "Classic project" space type (Tracker)

Pretty convoluted, but if you go to Settings, Space Types, Classic Project, then Issue under "Task Types", create a new "Process States" and try to delete the default one, a Sentry request fails to `/envelope` and this shows in console

```
DeleteConfirmationPopup.svelte:43 Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'length')
at S.$$.update (DeleteConfirmationPopup.svelte:43:17)
at new Q (31527.93c6a20….js:31:40907)
at Sr (49245.7f36f3d….js:13:107783)
at new Dr (49245.7f36f3d….js:13:109008)
at Hv (bundle.bd3a6fa3ebbd4…2c0.js:10544:244993)
at new Zv (bundle.bd3a6fa3ebbd4…2c0.js:10544:253284)
at KC (bundle.bd3a6fa3ebbd4…2c0.js:10544:254268)
at Object.p (bundle.bd3a6fa3ebbd4…2c0.js:10544:255543)
```

Also this:

```
fetch.js:46


POST https://o4506745347964928.ingest.sentry.io/api/4506745359695872/envelope/?sentry_version=7&sentry_key=19731177cb434d395dbaa60456da0b6e&sentry_client=sentry.javascript.svelte%2F9.22.0 net::ERR_BLOCKED_BY_CLIENT
```