ion9

*cfn-lint version: (`cfn-lint --version`)* ``` pip install cfn-lint Collecting cfn-lint Downloading https://files.pythonhosted.org/packages/97/1c/eca74684dea7385c505c52eb5adf578e83f7d3e6890c50791753c54b1639/cfn-lint-0.18.1.tar.gz (1.8MB) ``` *Description of issue.* When updating a stack I found that there is no check for this...