Microsoft Project Service Core Jan 2026 Update locked Plans table

We recently noted the Microsoft Project Service Core was updated to 1.0.161.1772:

This update has locked our Plans table, no changes are allowed to the forms and creating new columns is greyed out:

We cannot make use of Planner in our model driven app (Planner Premium, non-default environment). After a new Plan is created, the user receives this message when opening the Plan:

Two days ago we were in this version 1.0.160.2874):

and everything was working as expected.

Any guidance would be much appreciated as we are not sure if this is a permanent lock or once the update cycle is completed we will be able to go back to edit Plan forms and columns.

Thank you in advance