在compilation时出现 Warning (292000): FLEXlm software error: Invalid (inconsistent) license key. The license key and data for the feature do not match. This usually happens when a license file has been altered. Feature: quartus License path: D:\quartus\quartus\bin\license.dat FLEXnet Licensing error:-8,523 For further information, refer to the FLEXnet Licensing End User Guide, available at "http://www.macrovision.com".该怎么办？