Goto matrix, e.g., Tax report definition, copy some cell (cell1) with Ctrl+C, then cut another cell (cell2) content with Ctrl+X, then paste with Ctrl+V. Previous clipboard content is pasted (cell1)
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 ...