There were differences of opinion about gentiles and laws. There were controversies about the missionary work of Paul. There were problems in his churches and tension among the Christians in Rome. God's church has never had complete doctrinal perfection. Throughout history, Christians have wrestled with different doctrines and practices.
Doctrinal errors are nothing new.
That's why it's important that we always remain willing to re-examine the issues, admit our fallibility and be willing to change and grow in the grace and knowledge of our Savior. It may be difficult at times to change our ways, but that's what we have been called to do. We are disciples, and thankfully, we are learning.