Revert SQLAlchemy identity check and add error display

[canihavesomecoffee]

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Re-applies the previously reverted fix, and fix the missing error display.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud