Disturbed by QuickBooks error code 6143 » and can’t find the right way to get rid of the issue. Well, if that is the case, then this segment is something that would be of great assistance to you. You might not be aware of the fact that the error code 6143 in QuickBooks is said to be a database validation error. You can experience it when the company file is accessed or upgraded. You can land into QuickBooks error 6143 due to a couple of factors. These reasons are elaborated later in this segment along with the right fixes.