This document is a guide for upgrading ABP v9.0 solutions to ABP v9.1. There are no breaking changes in this version that would affect your application.
You might need to update some constant names due to the OpenIddict 6.0 upgrade, which is explained in the following migration guide:
In addition, ABP version 9.1 has been upgraded to incorporate Angular version 19. Consequently, we recommend migrating your application to Angular v19 to ensure compatibility.