针对此问题的一个解决方法是使用AWS CLI和Boto3 python库来检测和解决子网重叠问题。以下是一个示例代码，该代码将检查给定VPC中的子网是否重叠：

import boto3
    
def check_subnet_overlap(vpc_id):
    ec2 = boto3.client('ec2')
    response = ec2.describe_subnets(
        Filters=[
            {
                'Name': 'vpc-id',
                'Values': [vpc_id]
            }
        ]
    )
    
    subnets_cidr = [subnet['CidrBlock'] for subnet in response['Subnets']]
    for subnet_cidr in subnets_cidr:
        for other_cidr in subnets_cidr:
            if subnet_cidr != other_cidr and is_subnet(subnet_cidr, other_cidr):
                print(f"Overlapping subnets: {subnet_cidr} and {other_cidr}")
    
def is_subnet(subnet_cidr, other_cidr):
    subnet_parts = subnet_cidr.split('/')
    other_parts = other_cidr.split('/')
    
    if subnet_parts[0] == other_parts[0]:
        return True
    
    subnet_mask = int(subnet_parts[1])
    other_mask = int(other_parts[1])
    
    if subnet_mask > other_mask:
        return False
    
    netmask = (0xffffffff << (32 - subnet_mask)) & 0xffffffff
    
    subnet_ip = sum([int(x) << y for x, y in zip(subnet_parts[0].split('.'), [24, 16, 8, 0])])
    other_ip = sum([int(x) << y for x, y in zip(other_parts[0].split('.'), [24, 16, 8, 0])])
    
    return (subnet_ip & netmask) == (other_ip & netmask)

此代码将输出与其他子网重叠的任何子网。如果输出为空，那么没有任何子网重叠。注意，这个解决方法并不完美，它只能检测到有些类型的重叠情况，对于其他更高级的情况可能不适用。所以，一定要在使用前对其进行测试和验证。