Certain Stream packages have to be replaced by their Rocky Linux equivalents.

migrate2rocky/migrate2rocky.sh

@@ -133,9 +133,18 @@ stream_repos_pkgs=(
     [rocky-repos]=centos-stream-repos
     [epel-release]=epel-next-release
 )
+
 # Prefix to add to CentOS stream repo names when renaming them.
 stream_prefix=stream-
 
+# Always replace these stream packages with their Rocky Linux equivalents.
+stream_always_replace=(
+    fwupdate\*
+    grub2-\*
+    kernel
+    kernel-\*
+)
+
 unset CDPATH
 
 exit_message() {
@@ -905,6 +914,12 @@ EOF
             errmsg \
 $'Failed to disable CentOS Stream repos, please check and disable manually.\n'
 
+        if (( ${#stream_always_replace[@]} )) &&
+            [[ $(saferpm -qa "${stream_always_replace[@]}") ]]; then
+            safednf -y distro-sync "${stream_always_replace[@]}" ||
+                exit_message "Error during distro-sync."
+        fi
+
         infomsg $'\nCentOS Stream Migration Notes:\n\n'
         cat <<EOF
 Because CentOS Stream leads RockyLinux by the next point release many packages