using customize>project entities and beeing Admin, I am not able to modify "bug status" list value of "bg_status" system field, except rejected and reopen items. Can someone help me to solve it ?
Tks in advance.
Are you trying to change the actual list? That is done in Project Lists section of the customize screen (not entities).
If you want to change the value and it's only letting you do rejected or open - that is the transition rules of the group you are assigned (see the Admin Manual for more information on setting/updating these)
If you want to define a new list, e.g. translate the items to another language, the easiest thing is to define a new list and assign the BG_STATUS field to that list in the workflow (in Bug_MoveTo and Bug_New).