Weblogic - Error while booting - WLS_ADMINSERVER000000.DAT

Error: While booting the Web-logic Server received an error..

The persistent store "_WLS_AdminServer" could not be deployed: weblogic.store.PersistentStoreException: java.io.IOException: [Store:280021]There was an error while opening the file store file "_WLS_ADMINSERVER000000.DAT"

Solution:

To start the server again:
1. find -name "*.DAT" files in "<**>/domains>/<**>" directory (in our case!) and move or remove them
2. remove "EmbeddedLDAP.lok" and "AdminServer.lok" (maybe some more)