Camera already added by another user message

[Boatsman]

Hello forum, I bought different 24 US version IP cameras online. Installed all and connected to NVRs without any problem. However, two cameras give me a hard time when I tried to add them to Hik Connect. Once I entered SN, the following message popped up, saying that that SN was already activated. I guess bith cameras on question were customer return.
How can I deregister both cameras? Has anyone experienced similar issue?

Thank you all.

 

[Mike]

You may have to contact Hikvision directly and ask them to remove them from whatever account they tied to. They will probably ask you for verification code.