Is there any way to recover it, repair it.
Try to run -salvage on
a copy of that wallet using Bitcoin Core's bitcoin-wallet tool.
The result is depending on the deleted parts, if the (
encrypted) master key is intact, it should be able to restore it to a usable state.
Follow this post to use the command:
Try Bitcoin Core's bitcoin-wallet tool's "
salvage".
"
bitcoin-wallet" is in the "
bin" folder inside Bitcoin Core's installation directory (
where bitcoind and bitcoin-cli are located).
To use it, open Terminal,
cd to the directory where bitcoin-wallet is.
Then use the command (
provide the full path to the wallet.dat file):
bitcoin-wallet --wallet="E:\Folder\wallet.dat" salvage
It wont return with any response (
unless it failed) but you will see a backup file (
wallet.dat.xxxxx.bak) where the wallet.dat is located.
The new wallet.dat is the "
salvaged" wallet.
If yo don't know how to "
cd" (
change directory), simply type
cd "path_to_the_directory" in your Command Prompt window, in this case bitcoin core's bin folder.
e.g. (
Windows default):
cd C:\Program Files\Bitcoin\bin