Make Dimension Driven? Dialog Box

The highlighted dimension has made the sketch over defined or unsolvable.

If you have set the Over defining dimensions Sketch option to Prompt to set driven state, this dialog box appears when you add an over defining dimension to a sketch.

Either click Cancel to abandon the operation (the dimension is not placed), or select one of the following options, then click OK:

Make This Dimension Driven The over defined or unsolvable state is repaired.
Leave This Dimension Driving The sketch remains over defined or unsolvable. Look for other dimensions or relations that you can delete or change.
Select Don't ask again to suppress this dialog box. The option you last used will apply by default.
Use the right-click menu Driven option to toggle between dimension driven and dimension driving.