Validation rules one ID can be used in different year

Hi,

I have one scenario, which is 1 staff id cannot be duplicated. in the same year. For example
Staf ID 123 Year__c = 2021 [Accepted]
Staf ID 123 Year__c = 2022 [Accepted]
Staf ID 123 Year__c = 2022 [Not Accepted because already exist in 2022]. May I know how to do that using the validation rule?

not(isblank(vlookup( $ObjectType.Incentive__c.Fields.Id, $ObjectType.Incentive__c.Fields.Name,Name))) &&
Id <> vlookup( $ObjectType.Incentive__c.Fields.Id,$ObjectType.Incentive__c.Fields.Name, Name)

This is my current formula, but this does not work like how to suppose to.