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I ran a back up restore the our J4 beta site pre TF Store. As I want to do a clean install of TF Shop (free)

Installing com_tfshop_free.zip: failed

JInstaller: :Install: Error SQL Duplicate column name 'created_by'
Extension installation aborted.

The techfry.zip installed: yes

plg_tfshopauto.zip installed: yes

any suggestions

For fresh install of component, uninstall the component and delete component database tables from phpMyAdmin.

The tables are prefixed with "tfs_". There are 7 tables in total.

Then, try installing the component.

As mentioned I did a backup restore of the beta site which restores the DB to an earlier state (no TF Shop) Still cannot install TF Shop

Please enable the Debug from Global configuration to see where this error is occurring.

You can also send login details to mail@techfry.com, so that I can investigate the issue.