An Error Was Encountered

Error Number: 1327

Undeclared variable: home

select * from fil_articles where if ( month(now())-2<=0, UNIX_TIMESTAMP(concat(year(now())-1,'-',(12+(month(now())-2)),'-',day(now()))), UNIX_TIMESTAMP(concat(year(now()),'-',month(now())-4,'-',day(now()))) ) <= `date` AND active=1 AND type = 1 order by position ASC limit home,5