You must disable IS-IS or remote IS-IS.
Perform this procedure to configure the area name for home and remote areas.
enable
configure terminal
router isis or router isis remote
area-name WORD<0-255>
router isis enable or router isis remote enable
Configure the home and remote area names:
Switch:1>enable Switch:1#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Switch:1(config)#router isis Switch:1(config-isis)#area-name 30 Switch:1(config)#router isis remote Switch:1(config-isis-remote)# area-name 50