new gl for production order

my requirement is this

when i issue any material against any production order that time i maintain one g/l account, but now now i want to enter different g/l

so in obyc under transiction key GBB, i coppied vbr account modifier and cretae one new modifier zzz and against this new modifier i have assigned new g/l

but at the time of issue posting message is coming like

"Fld selectn for mvmt type 261 / acct 441701 differs for Business Area (033)

Message no. M7093"

i m not understand with this message and if any other mehod then plz tell me

thanks in advance it is very urgent.