Rails Best Practices

I am using metric_fu and rails_best_practices gems for my applications. But this time I was assigned to an old project that was under development for more than 1 year.

When I used rails_best_practices gem to generate warnings, I found hundreds of warnings.

The problem is that I can't find warnings generated by myself through all these hundreds of warnings. I don't want to fix all these warnings right now. I just want to fix my new warnings and mark the old warnings to check them in the future.

Is there any method to ignore these old warnings?