Template zero xid issue

Our template 0 database has an XID issue:

postgres=# select datname, age(datfrozenxid) from pg_database;

datname | age

--------------+------------

postgres | 1073965753

.

.

.

template1 | 1073892377

template0 | 2146706522

(7 rows)

When we try a vacuum full, it skips template 0:

[root(at)p02c06d130 mxl]# /mxl/var/pgsql/bin/vacuumdb -a -z -U postgres

vacuumdb: vacuuming database "postgres"

VACUUM

.

.

.

VACUUM

vacuumdb: vacuuming database "template1"

VACUUM

Suggestions for how to fix this issue?

Thanks,

Keaton