vmware patch recall and update manager

Have a question regarding the update manger notification.
Received a notification from update manager about a patch release to not to apply.
This is the first time i recived it since we installed the updatemanger for more than years.
Can this alert be legitimate?
Who is Participating?
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Check if it applies to you and your situation, and configuration.

Do you have virtual machines using VMware NSX for vSphere 6.x or Cisco Nexus 1000v ?

If not, this is not applicable to your installation.
If you mean KB2114245 /  ESXI550-201504002  (build number: 2702864),  
Then yes.

VMware has made the recommendation that those that updated revert using the alternate Bootbank;
if using NSX for vSphere,  Or Cisco Nexus 1000V,
since VMs may be unable to communicate over the network across ESXi hosts after updating.

See  KB2116370
You do not have to revert if you are not experiencing an issue and did  already update;  However,  VMware has indeed recalled the patch and removed the patch release from the download repository,  so you can't even download that update now if you have not already done so.

A cautionary note is that if there are some known problems with the patch,  that there might be more undetected related issues related, as few organizations would consider rolling it out after a recall.

But yes;  it's a good idea to read the notes carefully and decide whether they apply to you,  or whether you would like to be cautious  and keep your systems at an  "Available known good" patch baseline
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