I managed to install firmware 1.1.0 Build 20230725 Rel. 56344(4555). However, 1.1.3 Build 20250905 Rel. 39233 still shows up as a available update.

Some time ago, the router updated automatically, but the firmware does not match my region and hardware version. The installed version is 1.1.3 Build 20250905 Rel. 39233(4555), which is compatible...