The smaller the amount of coronal holes present on the suns surface equates to the smaller amount of heat and decay releases by the sun. Leading to conditions that are favorable of sunspot growth. (i.e.Points of access for hotter areas of the sun to magnetically charge and excape the suns surface). Corona holes are areas on the corona (the outer surface of the the sun or star) thats have a colder, less dense area than its surrounding. During solar minimums they are mostly in the polar regoins but during the solar maximums they can be found most everywhere on the corona.

meanwhile Sunspots are caused by intense magnetic activity which inhibits the normal convection of the sun's radiation on the photosphere... The intense magnetic fields would sometimes form coronal loops where parts of the corona is spewed millions of miles away from the surface and gravity pulls it back down into the sun. When the loop is completely thrown away that it escapes the sun's gravity, it is called a Corona Mass Ejection or CME.

So when the sunspots decay their magnetic properties are swept back into the corona. coronal holes and solar beltways in turn create avenues of release, stirring up the old matter and creating new sunspots.

google
sunspot formation
sunspot decay
coronal holes
relationship between coronal holes and sunspots
solar minimum
solar maximum...

The subject is pretty broad, so linking wouldn't really outline the entire process...