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1
For those who are suffering because of this error and lack of response of a tech person, you need to create the VPC first with corresponding subnets and at least two availability zones, then select that VPC when creating the DB. The error is reproducible if you want the RDS wizard to create the VPC and subnets automatically.
回答済み 3年前
0
Same happens to me when trying to create a db in ANY RDBMS. I've tried MariaDb, Sql Server.
回答済み 4年前
Yes, this was my issue as well. Create DB was failing because the Create DB Subnet was generically failing. And the DB Subnet creation was failing because I was using IPv6 only subnets, but dual stack mode requires dual stack subnets that support IPv4 and IPv6.