Remove --latest flag.

Change-Id: Ida9ed7b106d6b95d326485487c70f07faaa7108d
diff --git a/cicd/pipelines/tasks/task_update_unstable.jenkins b/cicd/pipelines/tasks/task_update_unstable.jenkins
index 9d26431..ea8fec0 100644
--- a/cicd/pipelines/tasks/task_update_unstable.jenkins
+++ b/cicd/pipelines/tasks/task_update_unstable.jenkins
@@ -54,7 +54,7 @@
                     installGpgKeyring()
 
                     sh """
-                       aptly snapshot merge --latest core-full-unstable-${stamp} ${debianMainMirrorSnapshotName} ${debianContribMirrorSnapshotName} ${debianNonfreeMirrorSnapshotName} ${coreSnapshotName}
+                       aptly snapshot merge core-full-unstable-${stamp} ${debianMainMirrorSnapshotName} ${debianContribMirrorSnapshotName} ${debianNonfreeMirrorSnapshotName} ${coreSnapshotName}
                        aptly publish switch --batch --force-overwrite --passphrase-file=/var/lib/aptly/keyring/passphrase.txt unstable filesystem:public:unstable core-full-unstable-${stamp}
                        aptly publish switch --batch --force-overwrite --passphrase-file=/var/lib/aptly/keyring/passphrase.txt unstable filesystem:public:unstable-bsp-enterprise ${bspSnapshotName}
                        """