Migrate to Max V problem.

Hi. I had one design which used EPM3064ATC44-10. Now I need to convert to 5M80ZE64C5.

I use AHDL and Quartus II 64 bit 10.1 Web (service pack 1). I got this error

Error: Fitter requires 9 LABs to implement the project, but the device contains only 8 LABs

I still have some LE left.

Total logic elements 69 / 80 ( 86 % )

How can I make the fit to avoid select the next device which is 5M160? Many thanks in advance.