sql check duplicate column values for same id

i want to check if any customer has more than 1 same insplanid_FK.

 ;with cte as  
 (  
 SELECT *,  
 count(cusid_FK) OVER (partition by cusid_FK,ccardholdername,insplanid_FK) as V_COUNT  
 FROM cusinsplan  
 WHERE ISNULL(insplanid_FK,'')!=''  
 )  
 select * from cte where V_COUNT>1

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