# Infor LN error 205: how to diagnose and fix it

> Source: https://netray.co/erp-help/infor-ln-error-205-diagnosis-fix
> Publisher: Netray (netray.co), AI and integration engineering for ERP and manufacturing systems.
> Section: ERP Help

## Short answer

Error 205 is a numeric database-layer error. In Baan and LN lineage it is commonly seen on write operations that conflict with an existing record, such as a duplicate key, but you should confirm for your version from the message text and logs. Identify the table and operation, check the key and any custom script or conversion that wrote the record, then correct the data or the logic.

## Kind

error

## System

infor-ln

## Erp

Infor LN

## Module

Database layer / runtime

## Query

infor ln error 205

## Alternate Queries

- baan error 205
- infor ln error 205 duplicate
- infor ln error 205 bshell log

## Applies To

Infor LN 10.x and Baan 5.x. Confirm numeric meaning in your version's error list.

## Steps

### Diagnose and fix

**Items:**

- Record the full message: table, operation, user, session and time.
- Open the bshell log for that time on the application server and note the lines around the error.
- Check the database driver log for the underlying native error to see whether it is a key, constraint or lock condition.
- Display the table's index definition and compare against the data you tried to write.
- Query the existing record with the same key. If it exists, find who or what created it (session, conversion, integration).
- Fix the cause: correct the input, remove a true duplicate through a supported function, or fix the script that generates the key.
- Retest with one record, then rerun the original job.

## Sections

### Typical triggers

**Body:**

Common triggers are a conversion or import run twice, a custom number series generating repeats, concurrent users creating the same key, and an integration replaying a message. After a restore or copy of company data, sequence tables sometimes fall behind the data, so new records collide with existing ones.

Look for a pattern. If it only happens in one session, suspect that session's script. If it happens in many, suspect sequence or data issues.

### Which logs to read

**Body:**

- The bshell log for the user's process shows the session stack and the failing call. The database driver log shows the native error. Together they identify the table, the index and the operation without guessing.
- Increase logging temporarily only if the standard logs are not enough, and remove it after.

### Safe correction

**Body:**

Never delete duplicates with direct SQL in production without a backup and approval. Prefer the standard delete or merge function, which maintains dependent tables. If a sequence is wrong, correct it using the supported sequence maintenance session and log the change.

Add a check to the conversion or integration to make it idempotent, so reruns do not repeat the problem.

## Pitfalls

- Assuming 205 means duplicate on every version without checking.
- Deleting rows with SQL.
- Rerunning an import before understanding why it failed.
- Ignoring sequence tables after a restore.
- Not keeping the log from the first occurrence.

## Ai Angle

A private assistant indexing your bshell logs and incident notes can match a new 205 to earlier ones, and show the table, key and likely creator of the clashing record. Netray runs this on your own infrastructure, read-only by default.

## Faq

### What does Infor LN error 205 mean?

**Answer:** It is a database-layer numeric error that, in Baan lineage, is commonly associated with record conflicts such as duplicates. Verify against your version's list and the accompanying text before acting.

### Which log should I check first?

**Answer:** The bshell log at the time of failure, then the database driver log for the native error.

### Can I fix it by restarting?

**Answer:** Rarely. Restart clears transient states but not duplicate data or wrong sequences.

### How do I stop it recurring?

**Answer:** Make conversions and integrations idempotent and check sequences after any restore.

## Search terms

infor ln error 205, baan error 205, infor ln duplicate record, infor ln bshell log, infor ln database error, infor ln runtime error, infor ln sequence, infor ln error troubleshooting

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