我编译时提示：

Warning: 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:  E:\altera\license.dat FLEXlm error:  -8,523 For further information, refer to the FLEXlm End User Manual, available at "www.macrovision.com".

请问咋个解决