[V4at]

I want to edit columns, how can I do it?

Код:

Current selection does not contain a unique column. Grid edit, checkbox, Edit, Copy and Delete features are not available.

[Wex56]

if you are on webhost:
you go to your db and pres plus to open menu
like this
http://prntscr.com/2tc924
then press columns you got on picture
and then press Primary
http://prntscr.com/2tc9dp

worked for me