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Editorial Team
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Asked: 2026-05-31T20:03:58+00:00

When running the rake db:structure:dump command, I encountered the following error: Larson-2:app larson$ rake

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When running the rake db:structure:dump command, I encountered the following error:

Larson-2:app larson$ rake db:structure:dump
pg_dump: server version: 9.1.3; pg_dump version: 9.0.4
pg_dump: aborting because of server version mismatch
rake aborted!
Error dumping database

How can I go about updating pg_dump? I have pg 9.1.3 installed, is there a way to update the references inside of Rails to the new version?

When I try to update postgres via homebrew, I get the following output:

Larson-2:app larson$ sudo brew upgrade postgresql
Password:
Error: postgresql already upgraded
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1 Answer

  1. Editorial Team

    Here’s how I resolved the issue, first update homebrew:

    brew update
    if you get this error: error: Your local changes to the following files would be overwritten by merge:

    then:

    cd /usr/local/cellar
git reset --hard FETCH_HEAD

    After you finish updating homebrew:
    sudo brew install postgresql

    Which will install 9.1.3 (or the most current version of pg) and any dependencies.

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