Global solder mask min width and/or margin are not set to 0?

About to make my gerber files and I get this warning:

global solder mask min width and/or margin are not set to 0

How would one go about fixing this?

File/Board Setup…/Design Rules/SolderMask/Paste

I just gave you a link to How does solder mask layer work? in another thread, you should read it.