Issue while creating new Set

Hi,

I am trying to create a set name via GS01 transaction. When I try to create, it says "set name already exist".

When I go to GS02/GS03 and try to display the set name it says " Set name does not exists".

Because of this I am neither able to create nor view the set.

The problem is only for 1 particular set name "ZFI_SERV_MAT" in my system.All the other set names are working fine. Only if I try to create with this particular name the issue is being raised.

Also there seems some buffer which is storing the set and because of which it says "Set already exists". Not sure how to clear this buffer for this particular set.

Please help me with this.