False error "Multiple peer nodes with property index.." when --hugo

[Georgi Pavlov]

What happened:
Getting "Multiple peer nodes with property index: true detected in ..." for any structure that features node with

properties
  index: true
...

when built with --hugo flag, even if there is only one declaring index:true.

What you expected to happen:
The error should not be yielded if there is a single or 0 nodes declaring index:true, when built with --hugo.

/kind bug
/priority critical