​Hi Everyone,

First post and I'm a complete beginner when it comes to Postgresql, however 
I've been tasked with updating a versionn 9.5 install on Ubuntu 20.04 to just 
about any later version I can get (latest preferably) but have hit a number of 
roadblocks.

The machine has version 10 and 12 on it and by default, something I'm not sure 
how to change, postgresql tries to update to V12. However it hits the following 
errors when trying to update

Upgrading database moodlelive...
pg_dump: error: Dumping the contents of table "mdl_local_intelliboard_details" 
failed: PQgetResult() failed.
pg_dump: error: Error message from server: ERROR:  could not access status of 
transaction 2745040900
DETAIL:  Could not open file "pg_clog/0A39": No such file or directory.
pg_dump: error: The command was: COPY "public"."mdl_local_intelliboard_details" 
("id", "logid", "visits", "timespend", "timepoint") TO stdout;
pg_restore: error: could not read from input file: end of file
Error during cluster dumping, removing new cluster

This is quite a handful of errors which I'm not sure how to resolve, or why 
they're happening (missing file I understand the error but not why it's looking 
for that file or where it has gone) any help would be very, very appreciated. 
As i said i'm a total beginner so apologies if any of this is particularly basic

all the best


Adam Norwood

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