Forum Discussion
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
5 Replies
We have also noticed this across multiple customer environments, and it is causing major issues. This change needs to be reverted immediately. We can't have the ability to create custom fields and views removed overnight from the system.
AlexanderLahuerta could you please comment on this. The 22 january 2026 is really blocking any development on the Project-app related to Planner Premium.
We’re experiencing the same issue and are very curious to know what the solution is.
We’ve rolled this out to several customers, and now nothing can be modified in this table anymore, which is a major problem.
Same problem here at several customers! The msdyn_project / ,sdyn_plan table is the heart of the complete solution. Making this a managed table is a disater for any update or change to the solution. Microsoft needs to roll-back the update which makes the plan/project table managed.
We’re experiencing the same issue and are very curious to know what the solution is.
We’ve rolled this out to several customers, and now nothing can be modified in this table anymore, which is a major problem.
