The current transaction has been rolled back because of a system error.

This error message usually indicates that there was an issue with the system while trying to complete a transaction, which caused it to be rolled back. The specific cause of the error can vary depending on the system and the context in which the error occurred. It could be due to a problem with the database, network connectivity issues, insufficient system resources, or other issues. To resolve this error, you may need to investigate the cause of the error and address any underlying issues with the system.

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Transaction rolled back because it has been marked as rollback-only

This error message typically occurs in a transaction management system when a transaction has been marked as rollback-only, meaning that it cannot be committed and must be rolled back. There are a few common scenarios that can lead to this error:

1. An exception has been thrown during the transaction and the transaction manager has marked the transaction as rollback-only in response.

2. The application code has explicitly marked the transaction as rollback-only, perhaps in response to some condition being met.

3. There is a problem with the database or some other resource being accessed during the transaction, causing the transaction manager to mark the transaction as rollback-only.

To resolve this error, you will need to identify the root cause of the problem and take appropriate corrective action. This may involve fixing a bug in your application code, resolving a problem with the database or other resource being accessed, or making changes to your transaction management configuration. In some cases, it may be necessary to consult with a specialist or vendor support team to help diagnose and fix the issue.