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Hello,
I assume this is a self-managed postgres database? You'll need to upgrade the database from v9 to v11, you cannot just use the database files created in one version from another db engine version.
You can refer to this documentation for instructions for example: https://www.postgresql.org/docs/11/pgupgrade.html
Regards
answered 3 years ago
0
First attach to v9 , upgarde the db to v11 and from this point you have the data on EBS ready for another detach-attach as v11
answered 3 years ago
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