In this example under the hood you are creating two subnets. One for your subnets “vpc-private-subnet” and then it also makes another subnet when you make the VPC subnet connector. You supplied 10.0.0/24 and 10.0.0.0/28. For these two subnets ranges. However those two ranges overlap. You need to change one of the ranges to avoid this error.

yeah I understood that, but cant i just use the subnet that I created? I want to use private google acces so I can connect cloud run by assigning private static ips.| because i cant make them discover themselves by just using vpc connector