Goal Management: Hide add button for adding a goal

Hello,

We have the following requirement.

As a line manager, i searched for an employee. We have 2 goal plans namely 2023 Company Objectives and 2023 Individual Objectives.

The line manager should not be added to add any goals for an employee only for the 2023 Company Objectives. In other words, the add button should not be visible.

If we'll hide the add button through sandbox, then will this hide the add button for the other goal plan?

Another solution is that if we restrict it by goal plan id, so upon the next year when we will create 2025 Company Objectives, we'll need to modify the el expression each time.