Is there a way to Undo FA Year End Closing?

Hello,

I am currently facing an issue where the user accidently run Fixed Asset Year End twice. Both 2015 and 2016 are closed when only intended to close year 2015. User has run Depreciation for year 2015 up to mid year. There is no backup thus restoration is not possible. Is there a way to undo FA Year End Closing?

Thank you in advanced.

Regards,

Vince