Adding the host which includes vcenter on itself to the vcenter

Hi,

3 Hosts, ESXi 6.7 and VCSA 6.7.

VCSA itself is installed on Host 1.

I added hosts 2 & 3 to vCenter. No problem. But while adding the Host 1 which I said contains the vcenter itself I face this error : A general runtime error occurred.

I guess this is because vcenter is there itself. Am I right or I should look for other issues?

And if I'm right how should I fix this? Turning of vcentervm, move it to a shared storage, go to other hosts and add it manually to inventory and ....

Thanks