APEX 4.0.2.00.07
Oracle 10.1.2.0.0
I have 2 workspaces, the one regard as Dev env, another regard as Pro. env. 
When the change need to be migrated, the some page of Dev workspace should be copy to Pro. one. I export the pages what I want to move from Dev., then try to import it into Pro. but I get the error as below:
Page Origin: This page was exported from a different application or from an application in different workspace. Page cannot be installed in this application. 
Is there a better way to resolve? I don't want to copy the page one by one.
Thanks and Regards.