USE [envisage]
Go

declare @roles table (
ID   INT           IDENTITY (1, 1) NOT NULL,
Name nvarchar(4000),
[Count] int
);
insert into @roles
select Name,count(Name) from AspNetRoles group by Name having count(name) > 1


 
declare @i int=1
declare @max int
select @max=count(ID) FROM @roles
declare @OnName nvarchar(4000)
declare @roleIdx int=1
while ( @i <=@max)
begin
   declare @count int
   declare @Name nvarchar(4000)
   declare @Id nvarchar(128)
   select @Name=Name,@count=[count] from @roles where ID=@i
   set @roleIdx=1
   while @roleIdx < @count
   begin 
		SET @Id=''
		select top 1  @Id=Id from AspNetRoles where Name=@Name
		if not isnull(@Id,'') = ''
		begin
			UPDATE AspNetRoles set Name=@Name+'_'+convert(nvarchar,@roleIdx) where Id=@Id
		end
		set @roleIdx=@roleIdx+1
   end
   set @i=@i+1

end