Unable to upgrade from 12 to 13. Version conflict

Hi,

When i try to upgrade from Umbraco 12.3.3 to 13.1.0 i get the following error:

NU1107	Version conflict detected for Umbraco.Cms.Web.BackOffice. Install/reference Umbraco.Cms.Web.BackOffice 13.1.0 directly to project universe-web to resolve this issue. 
 universe-web -> Umbraco.Cms 13.1.0 -> Umbraco.Cms.Targets 13.1.0 -> Umbraco.Cms.StaticAssets 13.1.0 -> Umbraco.Cms.Web.BackOffice (>= 13.1.0 && < 14.0.0) 
 universe-web -> SeoToolkit.Umbraco 3.4.0 -> Umbraco.Cms.Web.BackOffice (>= 11.0.0 && < 12.999.0).

I have set the project to use .NET 8 prior to running the updates.

I then tried following the advice given in the error message but that seems to be pandoras box as for each reference i add it just errors out wanting another direct reference and again and again.

What am i doing wrong? In the past i’ve always just opened nuget manager, selected the Updates tab and then updated the packages with no problem.


This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/113513-unable-to-upgrade-from-12-to-13-version-conflict