diff --git a/build_stage1.sh b/build_stage1.sh
index 553a267..6554e02 100755
--- a/build_stage1.sh
+++ b/build_stage1.sh
@@ -62,10 +62,6 @@ fi
 
 ostree remote add --repo=/srv/repo centos-atomic-host --set=gpg-verify=false http://mirror.centos.org/centos/7/atomic/x86_64/repo && ostree pull --depth=-1 --repo=/srv/repo --mirror centos-atomic-host centos-atomic-host/7/x86_64/standard
 
-# temp fix for issue 259
-
-ostree --repo=/srv/repo static-delta generate --from d433342b09673c9c4d75ff6eef50a447e73a7541491e5197e1dde14147b164b8 --to 841fae51e5b68716a9996ddbdb4e543855bbfab9c6e4cb433267b24e41e8bbc1 && ostree --repo=/srv/repo summary -u
-
 ## compose a new tree, based on defs in centos-atomic-host.json
 
 rpm-ostree compose --repo=${OstreeRepoDir} tree ${GitDir}/centos-atomic-host.json |& tee ${BuildDir}/log.compose
diff --git a/centos-atomic-host.json b/centos-atomic-host.json
index 075b5eb..8a29d58 100644
--- a/centos-atomic-host.json
+++ b/centos-atomic-host.json
@@ -59,7 +59,7 @@
     "documentation": false,
 
     "initramfs-args": ["--no-hostonly", "--add", "iscsi"],
-    "automatic_version_prefix": "7.20170405",
+    "automatic_version_prefix": "7.20170421",
     "mutate-os-release": "7", 
     "postprocess-script": "treecompose-post.sh",