Hi, there's no universal tool to do that.
What You can do is edit needed functions to log in the message if there's an error(for example XXVcRecordSave/XXVcRecordUpdate/XXVcRecordRemove)
Hi, Paul.
Sounds like you're talking about REST API. And that your are overwriting data with older values if B managed to read record before A finished to update it. Classic conflict resolution ...