There is a maximum of 255 zones allowed. 

”.

You have left zones empty and with the name “

”.  They will be changed to “

You have left zone(s) with the name “

You have left empty zone name(s). They will be filled with “

You have deleted all zone names.  This port will adopt the name “

Zone names must be shorter than 32 characters.

Zone names must be unique within the list of Phase 2 zones.