To reset the inheritance on a particular table, please do the following:
1. Switch to the Physical/Dimensional model
2. Right click the table and choose the Columns Editor
Therein you may press the reset inheritance icon that resembles an erwin icon, please see figure 1 below:
The Reset Column Properties window opens (figure 2).
Now you can check on All columns of Table
and Physical Data Type
You can also select any other additional properties that you would like to reset.
Suggestion: First take a backup of the model and reset the entire model in the backup file. Why? Resetting the entire model will avoid missing any columns. We can then know if this is a strong approach for your problem or not. After verifying that works, then proceed to the original model and reset the inheritance on just the individual columns.