FAILURE : Group with same name already exists. Please provide different value for Group Name

FAILURE : Group with same name already exists. Please provide different value for Group Name


I don't know why system alway show that message while i had just updated Group's content.
Not long ago, when i created a new SLA with new name but system still notified that "....same name...." and it was not create anything. 
I think that's a problem.
Please help me how resolve that problem!
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