Redmine

Hello,

After creating au project with identifier "autocomplete", loading https://<my-redmine-instance>/projects/autocomplete/ fails with a 406 error ("406 Not Acceptable").

Other pages (/projects/autocomplete/issues/, /projects/autocomplete/news, ...) work without error.

Relevant logs :

mars 23 19:33:01 puma[2142027]: I, [2026-03-23T19:33:01.136871 #2142027]  INFO -- : [42168f4a-0ece-439f-b708-93f442edda1a] Started GET "/projects/autocomplete/" for 127.0.0.1 at 2026-03-23 19:33:01 +0100
mars 23 19:33:01 puma[2142027]: I, [2026-03-23T19:33:01.137804 #2142027]  INFO -- : [42168f4a-0ece-439f-b708-93f442edda1a] Processing by ProjectsController#autocomplete as HTML
mars 23 19:33:01 puma[2142027]: I, [2026-03-23T19:33:01.159232 #2142027]  INFO -- : [42168f4a-0ece-439f-b708-93f442edda1a]   Current user: test1 (id=4)
mars 23 19:33:01 puma[2142027]: I, [2026-03-23T19:33:01.160136 #2142027]  INFO -- : [42168f4a-0ece-439f-b708-93f442edda1a] Completed 406 Not Acceptable in 22ms (ActiveRecord: 7.4ms | Allocations: 5409)
mars 23 19:33:01 puma[2142027]: F, [2026-03-23T19:33:01.160499 #2142027] FATAL -- : [42168f4a-0ece-439f-b708-93f442edda1a]
mars 23 19:33:01 puma[2142027]: [42168f4a-0ece-439f-b708-93f442edda1a] ActionController::UnknownFormat (ActionController::UnknownFormat):
mars 23 19:33:01 puma[2142027]: [42168f4a-0ece-439f-b708-93f442edda1a]
mars 23 19:33:01 puma[2142027]: [42168f4a-0ece-439f-b708-93f442edda1a] app/controllers/projects_controller.rb:87:in `autocomplete'
mars 23 19:33:01 puma[2142027]: [42168f4a-0ece-439f-b708-93f442edda1a] lib/redmine/sudo_mode.rb:61:in `sudo_mode'

Redmine version: 5.0.4-5+deb12u1 (installed via package from Debian repository on Debian Bookworm).
Database version: postgresql 17
Ruby version: 3.1