A common technique is to provide a no-argumentes activate event handler method that can check to see if the PAC is null, and return a page (or other redirect causing result). However, since the @PageActivationContext-related event handler executes too late, the field will always be null when that method executes.
Workaround: Don't use @PageActivationContext
|Field||Original Value||New Value|
|Assignee||Howard M. Lewis Ship [ hlship ]|
|Status||Open [ 1 ]||In Progress [ 3 ]|
|Status||In Progress [ 3 ]||Closed [ 6 ]|
|Fix Version/s||5.2.0 [ 12314122 ]|
|Resolution||Fixed [ 1 ]|