So I've downloaded and been syncing the Monero GUI wallet (0.11.1.0 Helium Hydra on Mac OS Sierra) without issue. However, today, the sync appeared to be stuck. A look into the log sees this error repeatedly popping up:

ERROR blockchain src/cryptonote_core/blockchain.cpp:3412 Error adding block with hash: <9769f933725fead7b146de1f29602e8cd20f7884b9b599c1ffbeacf8ce74653c> to blockchain, what = Attempting to add transaction that's already in the db (tx id 1968056) 2017-12-14 01:52:20.819 [P2P7]

I tried to do some research on this error without any satisfying results. Is there a good way to work around this?