There are two possible workarounds:
Go to the Assignments menu and select Device
Click on Device and Pin options
Click on Voltage under the Category selection
Change the default from 2.5V to the voltage of the bank that contains the AS signals. (Note this setting will apply to any I/O you have which does not already have an I/O standard assignment).
Make I/O standard assignments to all the pins that are mentioned in the error message, so that they meet your design VCCIO requirements for the bank that contains the AS pins.
An example is shown below.
set_instance_assignment -name IO_STANDARD "3.3-V LVTTL" -to "top_altasmi_parallel_l852:top_altasmi_parallel_l852_component|cycloneii_asmiblock2~ALTERA_DCLK"