Steps to reproduce:

1. Create HTTP Agent item type
2. Select GET and put the correct URL and Auth header. The API does not require any HTTP paramenters
3. Test the item via Test button
4. ...

Result:

The returned error complains additional properties are not allowed

See screenshot KO_1 and KO_2

Expected:

If I remove the empty query field, the test runs successfully

See screenshot OK_1 and OK_2

Problem is, when I save the item, and then reopen it, the empty query field is still there. Seems it can't be removed.

The API endpoint is a Proxmox Server 8.2.4

Thank you
See attached patch file...