Trouble adding material to design table

Hi,

 

I just created a design table and added the material.

 

But, exiting the table I got this error :

 

These column headings contain cell values which no longer drive the model. This issue can occur when a change to a feature parameter causes the feature parameter to not be driven by a dimension in one or more configurations.

 

\$LIBRARY:MATERIAL@Gears

 

Could someone help, please ?