Duplicate DNS entries

I have two domain controllers running Windows Server 2003. We have a mix of file servers running Server 2003 and Server 2008.

 When I open DNS on the 2003 domain controllers, I see an entry for our current file server of with an ip address of 10.1.1.7.  I also see entries for two old file servers with the same ip address.
 
These old file servers were removed from the network years ago. One was an NT Server and the other was a Windows 200 Server.  

Can I delete the DNS entries for the old file servers even though they have the same ip address as our current active file server in the DNS entry?

 It is not causing any problems, I just want to clean it up.

thank you,
cja
cja-tech-guyAsked:
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Miguel Angel Perez MuñozConnect With a Mentor Commented:
Yes you can delete, and I recommend you set up scavenging option to do automatically: http://technet.microsoft.com/en-us/library/cc753217.aspx
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cja-tech-guyAuthor Commented:
What happens if I delete a record for an active machine?  Will that machine be able to connect to the network when it is turned back on and will the user be able to login and access network resources on file servers?

thanks,

cja
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Miguel Angel Perez MuñozCommented:
Automatically (if DNS\computer configuration was not modified) re-register on DNS. It is possible any workstation loses DNS resolution if deleted entry was live, but is a temporary situation, doing a ipconfig \flushdns on affected workstation must be resolve failure.
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