FCTR Account accumulation - BPC 7.5 NW

Dear xperts,

i am able to successfully run currency conversion,account transformation rule & data packages &

was able to get balance in FCTR Account correct.

but while running package second time balance in fctr account gets accumalated & not replaced by new correct value.

so i have to every time clear data and then run packages to get correct balance in fctr account

so is there any way to avoid clearing of data and get values replace in fctr account each time we run data package.

thanks

kashyap