Looking at the image, it seems to me you are importing the backup of a private network to a node initializated with the Mainnet.
I suspect this because:
- geth says ChainID is 1, so Mainnet
- the import process seems to stop with the very first block and
the error is unknown ancestor, so it don't know the genesis block
- your block #1 hash is not the hash of the first block of the Mainnet, that is 0x88e96d4537bea4d9c05d12549907b32561d3bf31f45aae734cdc119f13406cb6
If this is the case, just remove the geth database:
$ geth removedb
and init again with the correct genesis block:
$ geth --networkid [yourNetworkID] init [yourGenesisFile.json]
If you don't remember the networkID, you should be able to read it in the genesis file.