Can someone help me out? I mined a bunch of coins in 2014 and kept the wallet of that date. Today i thought  it was a good day to upgrade the wallet. I backuped it in two ways: I used the backup function in the wallet and i just backuped the wallet.dat in the %appdata%Digibyte folder.

I installed a new wallet and replaced the wallet.dat. But now it gives me a fatal error on start:
Exception: 11DbException
Db::open: Invalid Argument

can anyone help me please???