This name suffix is enabled for routing to the forest: %1. Therefore, Windows routes all authentication requests that use ...

This name suffix is enabled for routing to the forest: %1.
Therefore, Windows routes all authentication requests that use this name to that forest.

To route the authentication requests to the forest: %2,
disable routing to the name suffix for the %1 forest.

Would you like to open the Name Suffix Routing tab for the %1 forest trust
where you can disable routing for this name suffix now?