Deleting project collaboraters deletes the project?!?

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We have our own (self-hosted) QFieldCloud (ver. 0.26.4) installed on a server. Everything is working more or less very nicely.

However, today I wanted to remove project collaborators from a project from the QFieldCloud admin webpage (https://<server url>/admin/core/project). I checked the box to the right of the collaborator and clicked Delete. I was in a hurry, so I didn't read the information carefully and just clicked "Yes, I'm sure" (I knew which collaborators I wanted to remove and I had checked the correct boxes). Too late I detected that I deleted the whole project from the cloud! I only wanted to delete three collaborator (out of four). And that's what I expected within the "Project collaborators"-tab (just an example from another project with only one collaborator). Here I would check the check box to the right:

When I want to delete the whole project, I have done it from the Projects list:

I know I can blame myself for not reading carefully enough, but I would suggest that it should be possible to only delete (remove) collaborators within the "Project collaborators"-tab. (Luckily, we have back-up routines of the self-hosted cloud, so I could retrieve the deleted project.)

P.t. how do I delete (only) collaborators from a project in QFieldCloud admin?