it deletes wallet.dat and makes of it wallet.bak, and creates new wallet.dat. whats the reason? i have new nodes inserted ,maybe that? but blockchain is synced, and i dont know the old nodes anymore?
redactedMeanwhile you could also start the same thread in the Bitcoin section and substitute Bitcoin client for Litecoin client in your question as it is very likely that the issue you are having could just as easily (and possibly more likely) be answered there.
Don't do that. This might be an issue with Litecoin core software itself. Also, it's best not to mislead others; that will get you painted red.