Problem: Creating new features using the Trace tool may assign M-values
When using the Trace tool to create new features, all aspects of the geometry being traced are captured.
If the traced feature contains measure values (M-values), the new feature will contain those measures.
The Trace Tool is capturing too much information from the feature it is tracing.
Solution or Workaround
Before finishing the edit sketch, right click the sketch to bring up the Properties dialog box and clear all M values.