WLST: how can I rollback a nmEnroll-command?

Hi all,

as I tried to initiate a new managedserver on a new host (named: Host_B), I did a mistake and initiate nodemanger via connect to Host_A, e.g.:

connect('weblogic','mypw','t3://host_A:7001')
nmEnroll('/oracle/FMW/Middleware/user_projects/domains/myDomain', '/oracle/FMW/Middleware/wlserver_10.3/common/nodemanager')

I tried again with Host_B and nodemanager works correct on Host_B. But in log files of first host (Host_A) I get the following error:

#### <Error> <NodeManager> <host_A> <AdminServer>
 <BEA-300048> <Unable to start the server WLS_FORMS_B : Exception while starting server 'WLS_FORMS_B'>