There are various troubleshooting methods for QuickBooks error 6190 and 816; one of the most common ones has been mentioned below.

Solution: Troubleshoot the Mismatch to Resolve Error 6190 816

• First, head to the location of your  QB company folder and look for the Transaction folder. 

• Note that the QB company folder and the transaction folder can have the same name, but their extensions might be different. 

• You will also have to identify the Two files by their extensions, then right-click the Company files and hit on the Rename option to change the name.

• Make sure to avoid changing the extension of the file and change the Transaction file name as well.