There is manual action that is needed to take in case the client (0.12.2.4) is on the wrong chain not the longest chain:
thesin 12:28 AM
There are 2 choices, you can reindex (which is resource hungry option) or run this 2 commands with terracoin-cli or the debug console to get back on the right chain, I will be updating overview, insight and services to the longest chain in a few minutes.
invalidateblock b7d648573174c2f0375a8da2cbe07ddc81d8674e4514f475d104d555a0dc64ff
reconsiderblock 9b94a08becfe66b72b88e1f9c796e43fe03bd645337f78845922803cb40389e0