someone have the same issue:
https://bitsharestalk.org/index.php?topic=8391.0this happened because you have lost some balance private keys.
As I know, when you regenerate keys from this wallet, you will lost them again after you close the wallet.
so you need to restore your wallet from a clean backup json file. the best backup is after you just create your account.
If you can't find the early backup, I recommend you to create a new wallet, and import the account private key.
after you have a clean wallet, you can run the command to find all your balance key back.
wallet_regenerate_keys <account> <num>
the <num> you can try 100, if it's not enough, try 150 , or more.