[NTG-context] about table operation in lua-ConTeXt

Dear all, It may be a slight off topic. In the following example, I copied a table “m” to “tempM”, and remove the last row of tempM. Then the output is “ 2, 2” I checked the contents of tempM and m and found that they are same even though I didn’t touch m. I want to remove the last row of tempM while keeping the table m untouched. Please tell me how to do it. Thank you. Best regards, Dalyoung \startbuffer[test] \startluacode m = {{0, 2, 4},{2, 3 , 4}, {2, 2, -6}} local tempM = {} tempM = m table.remove(tempM) context(#tempM, “, ” , #m) \stopluacode \stopbuffer \starttext getbuffer[test] \stoptext