Namespace sites replacement issue

When master and remote nodes both have sites with same name, after master sites assigned to namespace with remote node - on remote that sites will be changed, but still will appear as just local sites (not from namespace). And if this sites are only namespace content - on remote that namespace will not be created at all.

Steps to reproduce the behavior:

1. Create different sites with same name on both nodes locally (nodes don't have common namespace).
2. On master node create namespace with remote node.
3. Add site to namespace in site edit tab.
4. Connect to remote - site updated, but namespace not created (no namespace tab in sites list page, and no namespace in namespaces created)

Info:

• Server OS: docker image from dockerhub
• Server Arch: amd64
• Nginx UI Version: 2.6.0
• Your Browser: Microsoft Edge 130.0

Fixing by deleting all affected sites from remote, and sync manually from master.