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https://help.tallysolutions.com/docs/te9rel61/Licensing/Error_Code_6413.htm

Error Code 6413: Unable to perform this action. You are now in Educational Mode. Reactivate your license and update.

Cause

This error occurs when your license has been surrendered from Control Centre or Tally Solutions website, and you try to update the license in your computer.

Solution

You need to first reactivate the license on your computer, and then update the license.