Someone had this problem with the name of the group?

EDIT:

Apologies, my fault, formerly copy these groups and pasted into another evensheet, then the names were changed automatically to not coincide with the originals.

But there must be a problem because they can not have the same name.

I had ordered all groups as follows:

AREA 15 ZONA 0

AREA 15 ZONA 1

...

At some point C2 has changed the name of this groups and now are as follows:

As you can see ... they are all the same !.

How is possible? C2 does not allow the same names in the groups.

Apologies, my fault, formerly copy these groups and pasted into another evensheet, then the names were changed automatically to not coincide with the originals.

But there must be a problem because they can not have the same name.