lsarpc LSA_DELETE failed: What does this mean?

I have been noticing the following error on our samba server:

smbd[30271]: api_rpcTNP: \lsarpc: LSA_DELETE failed.

I haven't had any luck figuring out what it is, and my experience with samba/lsaprc is fairly limited. Has anyone seen this before and have any idea what it is trying to tell me?