APT - packages have been kept back

[mgqk15]

Hi,

I've installed Linuxlite 6.0.
It's been working fine but today when I try an APT UPGRADE I get the following message that packages have been kept back.

How do I resolve

The following packages have been kept back:
  fonts-opensymbol libegl-mesa0 libgbm1 libgl1-mesa-dri libglapi-mesa
  libglx-mesa0 libreoffice-avmedia-backend-gstreamer libreoffice-base-core
  libreoffice-common libreoffice-core libreoffice-gnome libreoffice-gtk3
  libreoffice-pdfimport libreoffice-style-colibre libreoffice-style-elementary
  libreoffice-style-galaxy libreoffice-style-tango libreoffice-style-yaru
  libuno-cppu3 libuno-cppuhelpergcc3-3 libuno-purpenvhelpergcc3-3 libuno-sal3
  libuno-salhelpergcc3-3 libxatracker2 mesa-va-drivers mesa-vdpau-drivers
  uno-libs-private ure
0 to upgrade, 0 to newly install, 0 to remove and 28 not to upgrade.

Thanks for your help

Moz