ERROR: MultiXactId XXXXX has not been created yet -- apparent wraparound

Hello All,

I am running postgres 9.4.8 on centos 7 and few days ago I started to get
this error MultiXactId 32766 has not been created yet -- apparent
wraparound in 2 instances.

1. On one database server during the nightly task that does the "vacuum
analyze". I upgraded to postgres 9.4.9 as there is a reference to a bug
fixed with a reference to this error but I am still getting the same error
when I vacuum analyze. This database was created using pg_dump and
pg_restore (not pg_upgrade) from the previous installation which was still
postgres 9.4.6 but on SLES instead of CentOS. I only have one postgres
version installed on the server.

Autovacuum is turned on and I also have a task that runs vacuum analyze
every night.

postgresql94-9.4.9-1PGDG.rhel7.x86_64
postgresql94-plperl-9.4.9-1PGDG.rhel7.x86_64
postgresql94-libs-9.4.9-1PGDG.rhel7.x86_64
postgresql94-server-9.4.9-1PGDG.rhel7.x86_64
postgresql94-contrib-9.4.9-1PGDG.rhel7.x86_64

psql (9.4.9)
=# vacuum analyze;
ERROR: MultiXactId 32766 has not been created yet -- apparent wraparound

This server only runs since June 2016.

2. The second instance of this error is on a new database server during
pg_restore on few CREATE INDEX, PRIMARY KEYS and FOREIGN KEYS statements
(postgres 9.4.8 on centos 7). In this case I dropped and recreated the
database and the second try succeeded without errors.

postgresql-14.csv:2016-08-14 05:33:59.753
CST,"postgres","test",19555,"[local]",57b055d4.4c63,11,"CREATE
INDEX",2016-08-14 05:28:20 CST,1/27230,5381,ERROR,XX000,"MultiXactId
1667854355 has not been created yet -- apparent wraparound",,,,,,"CREATE
INDEX...;

Please let me know if I should provide more info.

Thank you in advance,
Ioana