diff --git a/python-ipykernel.spec b/python-ipykernel.spec
index f21f87f..a9eab26 100644
--- a/python-ipykernel.spec
+++ b/python-ipykernel.spec
@@ -1,7 +1,7 @@
 %define pkgname %(echo %name | cut -d- -f2- | tr - _)
 Name:          python-ipykernel
 Version:       6.28.0
-Release:       1mamba
+Release:       2mamba
 Summary:       The IPython kernel for Jupyter
 Group:         System/Libraries
 Vendor:        openmamba
@@ -34,7 +34,8 @@ BuildRequires: python3-devel >= 3.11.5-3mamba
 %if 0%{?with_pyver}
 %define py_requires_append \
 Requires:     python-jupyter_client%{?pyappend:-%pyappend} \
-Requires:     python-pyzmq%{?pyappend:-%pyappend}
+Requires:     python-pyzmq%{?pyappend:-%pyappend} \
+Obsoletes:    python-ipykernel-py310 <= 6.28.0-1mamba
 %pyver_package
 %endif
 
@@ -69,6 +70,9 @@ CFLAGS="%{optflags}" %{__python} -m build --no-isolation --wheel
 %{_datadir}/jupyter/kernels/python3/logo-svg.svg
 
 %changelog
+* Mon Jan 15 2024 Silvan Calarco <silvan.calarco@mambasoft.it> 6.28.0-2mamba
+- obsolete -py310 subpackage
+
 * Wed Dec 27 2023 Automatic Build System <autodist@mambasoft.it> 6.28.0-1mamba
 - automatic version update by autodist