How can I protect Org spreadsheet columns from calculation?

Question

Consider:

Before

| plan      |  a | b | c |
|-----------+----+---+---|
| concern 1 | -1 | 0 | 2 |
| concern 2 |  2 | 1 | 1 |
| concern 3 |  0 | 2 | 1 |
|-----------+----+---+---|
| score:    |    |   |   |
#+TBLFM: @>=vsum(@I..@II)

After

| plan      |  a | b | c |
|-----------+----+---+---|
| concern 1 | -1 | 0 | 2 |
| concern 2 |  2 | 1 | 1 |
| concern 3 |  0 | 2 | 1 |
|-----------+----+---+---|
| 6 concern |  1 | 3 | 4 |
#+TBLFM: @>=vsum(@I..@II)

After the table is recalculated, my score: identifier is changed to 6 concern (no doubt the sum of concern 1..3). How can I prevent this?

Answer 1

This seems to work for me:

| plan      |  a | b | c |
|-----------+----+---+---|
| concern 1 | -1 | 0 | 2 |
| concern 2 |  2 | 1 | 1 |
| concern 3 |  0 | 2 | 1 |
|-----------+----+---+---|
| score:    |  1 | 3 | 4 |
#+TBLFM: @>$<<..$>=vsum(@I..@II)

$<<..$> means "the range of columns starting from the second and up to the last."

See References in the Org Manual for more.

Tested using Org-mode version 8.3.3 (8.3.3-51-g30bcff-elpa) and GNU Emacs 24.5.1.