Today error when upgrade from 2.5.1 to 2.5.2, discourse-assign

[IAmGav (Gavin Perch)]

you might want to update the system software before as well and make sure you on the correct postgresql.

apt-get update
apt-get upgrade

and then make sure you using PostgreSQL 12

PostgreSQL 12 update

WARNING! If your database is very large, you will need a lot of extra disk space (2x database size) and should be very careful with this upgrade! We just landed the long waited PostgreSQL major version upgrade. Any site admins rebuilding Discourse from the command line will be upgraded to PostgreSQL 12 from the old PostgreSQL 10. We are running this new version for a while on Meta, and everything is working fine. PostgreSQL 12 brings lots of improvements that will be automatical…