Survival Shooter Script Error

I am working on the part 6 of the Survival Shooter Tutorial ( Player Health ) , I follow every step of the tutorial but it shows this message after injecting the EnemyAttack script

Assets/Scripts/Enemy/EnemyAttack.cs(5,14): error CS0101: The namespace global::' already contains a definition for EnemyAttack’

What happens ? Can someone please help me to solve this ?

You already have an EnemyAttack script somewhere and you are trying to create another with the same name.