Utils and Unified packages are in continued development while Web is no longer under development. Hence, it is not possible to combine the same versions of the Utils package with the Unified and the Web models within the same dbt project.
If you'd like to run both, it is suggested to have 2 dbt projects, one with Web (and the max Utils version that supports) and one with Unified (which will support the latest Utils).
Run Unified package in parallel with legacy packages
