Hi, 

The error message "Record does not exist or has been deleted" is common when a user is trying to access a record that does not exist in the database or has been deleted. 

There may be several reasons why this error is occurring, including: 

1.The record may have been deleted by someone else or by some automatic means. 
2. The user may not have sufficient permissions to access the record. 
3. The user may have entered an incorrect ID or search criteria when trying to access the record. 

To fix this error, you can try the following steps: 

1. Check if the record exists in the database. You can do this by using ID or other search criteria to find the record. 

2. Check the user's permissions and verify that they have access to the record. 

3. Check for automated processes that may delete the record. If the record has been deleted. 

4. Check if it can be restored from a backup. If none of these steps fix the issue, you may need to seek further help

Regards