Description of problem:
Table sequences may get out of sync after database is restored.
We had that in  a customer database, the sequence value for generating option_id for vdc_options was 238 while the max(option_id) was 399. That resulted of course with PK violation.

Version-Release number of selected component (if applicable):


How reproducible:
Sometimes (hard to reproduce)


Steps to Reproduce:
1.
2.
3.
  
Actual results:
PK violation

Expected results:
We must validate correct SEQUENCE numbers in pre-upgrade step

Additional info:
http://www.postgresql.org/docs/8.4/static/sql-createsequence.html

Update the sequence value after a COPY FROM:

BEGIN;
COPY distributors FROM 'input_file';
SELECT setval('serial', max(id)) FROM distributors;
END;