I've configure site to site VPN between Head office and Remote office, In Head office i've a VLan 192.168.4.0/24 and other vlan where as in remote office vlan is 192.168.4.0/22.
This will will be overlapping subnet or not, I can configure static route and policy like i did for other vlans between 2 sites.
Will this imapct my local network as well as remote network
Please find the kb link for VPN with over lapping subnet .
You might also want to check below link for vpn with overlapping subnet between SRX and ASA.