LCD and SRAM Problems

Hello NiosII experts

I have a design containing an external SRAM and I 'm trying to add LCD controller but I can't assign FPGA pin numbers to the LCD-data pins because on my board (EP1C12Q240 C8 -Cycclone) some Data-pins are shared between the SRAM and the LCD Display. QuartusII is refusing to assign the same FPGA pin twice. Does any1 has a soluation? I appriciate all help