Here’s a good, clear review for that scenario, depending on who your audience is:
The system tried to claim a specific block of data, but the "handshake" failed.
operation, where an ESXi host attempts to update a datastore's heartbeat or lock a file but finds that the data on the disk does not match what it expected. Core Cause: ATS Miscompare Heartbeat Mechanism
If both nodes send this command simultaneously, the atomicity of the disk array ensures that only one succeeds. The other receives: The second node knows it lost the race.