PostgreSQL Error 22030: Duplicate JSON Key Value

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Description

Error 22030, 'duplicate json object key value', is a PostgreSQL Data Exception. It occurs when an attempt is made to insert or update a JSON object that contains the same key more than once. This violates the fundamental rule of JSON objects, which requires all keys within a single object to be unique.

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Error Message

duplicate json object key value

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Known Causes

4 known causes

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Application Logic Error

A bug in the application code dynamically generates JSON objects with duplicate keys before sending them to the database.

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Manual JSON Construction Mistake

When manually writing or editing JSON object strings, a key is inadvertently specified more than once.

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Data Transformation Issue

During data migration or ETL processes, source data is incorrectly mapped, leading to duplicate keys in the target JSON structure.

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Malformed External Data

Importing or processing JSON data from an external source that already contains non-standard duplicate keys within its objects.

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Solutions

Coming Soon

Detailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:

General Troubleshooting Tips

Check the error message carefully for specific details
Review recent changes that might have caused the error
Search for the exact error code in the official documentation
Check log files for additional context
Try restarting the application or service

Find Help

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Related Errors

5 related errors