Looks like you have your ear deployed and you trigger AS7 to deploy it again. I had a similar issue when there is a war.deployed file under deployments folder in AS7 and put a war.dodeploy.
I fixed it by deleting the file war.deployed.
Thanks for your sharing.:-)
But I don't see any war.deployed file under deployments folder. My project is a ear file and I use Maven to package the project. The strange part is when I start the server again ( no any changes, just execute standalone.bat ), the error was gone. *_*?
Have you tried looking / asking on the AS7 forums?
Ooooooooops.... I think I post in the wrong place, sorry and thanks for the reminder