Why the General Tab in Characteristics value assginment appears in CU50? How to remove this Tab?

Dear VC Modellers,

I have created the Chars Grouping Tabs using CU50 Interface design .

1. G

2. O

3. C

and further I can see these three tabs are populated with its chars. I do also see the General Tab which is undesired and not created. Why this Tab populated and how to remove this?