Open Enterprise Server 2 customers are advised not to download SUSE Linux Enterprise Server (SLES) 10 SP2 at this time. Open Enterprise Server 2 SP1, slated for release in late 2008, will require SLES 10 SP2, and an update mechanism will be provided at that time. Until then, rest assured that you will receive any SLES fixes relevant to OES 2 through the SLES 10 SP1 patch channel.
I suggest you visit the support forums to get more information on this issue. More specifically, check the following thread: http://forums.novell.com/novell-product-support-forums/open-enterprise-server/oes-linux/oes-l-install/329778-do-not-update-oes-2-sles-10-sp2.html
And while you are at it, also check the following thread on an issue with a different patch that appeared as OES2 update: http://forums.novell.com/novell-product-support-forums/open-enterprise-server/oes-linux/oes-l-install/329511-do-not-install-sles10-zypp-patch-sp2.html