Validation to avoid duplicate goals in the goal plan

Summary:

The employee is able to add same goal twice in the goal plan and system has not restricted him.

Can we have a validation to avoid duplicate goals in the goal plan? A goal plan should only have identical goals.

Content (required):

Goal Management: The employee was able to add same goal twice in the goal plan and system has not restricted him.

Can we have a validation to avoid duplicate goals in the goal plan? A goal plan should only have identical goals.

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Code Snippet (add any code snippets that support your topic, if applicable):