Error assigning Issue to project (after the issue has been created)

[lucas-labs]

Description

I'm getting an error when trying to assign issues to a project once the issue has already been created (it works if I assign the issue to the project while creating the issue).

That is, when trying to assign the issue to the project here:

The issue is reproducible in the Gitea demo (obviously, I can't see if the logs are the same, but I can't assign issues to projects there either)

Gitea Version

1.20.0+rc2-25-g1ddfe0313

Can you reproduce the bug on the Gitea demo site?

Yes

Log Gist

https://gist.github.com/lucas-labs/9622960103e75e627439bbe2ffc83f47

Screenshots

No response

Git Version

git version 2.35.0.windows.1

Operating System

Windows 11

How are you running Gitea?

As a Windows Service from the gitea-1.20-windows-4.0-amd64.exe binary provided in the downlaods page.

Database

SQLite

[Zettat123]

might be related to

gitea/routers/web/repo/projects.go

Lines 388 to 391 in 0403bd9

	oldProjectID := issue.Project.ID
	if oldProjectID == projectID {
	continue
	}