Is there a way to change the /tf in a rosbag?

I currently have a rosbag with a /tf topic containing only static transforms. Is there a way I can alter one of the transforms? I have tried creating a new filtered rosbag not containing the /tf and generating the /tf from a launch file. But I get issues when trying to display the pointclouds in rviz. I get the error : "Message removed because it is too old" when trying to display PointCloud2 topics.