Compiler Error AL0189
Note
The AL diagnostics topics are in preview. If you have input for this topic, we'd love to hear from you. Use our GitHub repo to create a PR and add content to this topic by going to here. To read about contributing, see Contribute to the Help. Thanks!
Attribute '{0}' cannot be specified, because '{1}' is already specified.
Description
Mutually exclusive attributes have been specified on the same variable or method. This is the case for handler attributes and event attributes, where only one attribute of each kind can be set on the same procedure.