Better to give her a fresh start with a new set of teachers.   That way she will not have to deal with with mending all of this past ill-will.  

If she is a bad principal, she will still be a bad principal at Riverbend Elementary.  And the school district can then let her go.

Heck, Riverbend is a much nicer and newer school than Page is.   Page is one of the older schools in the district.   It is 44 years older than Riverbend.  If anything, this reassignment is a promotion for her, to a much better school.