diff --git a/libmsym.spec b/libmsym.spec
index 1a203b3..ef78e05 100644
--- a/libmsym.spec
+++ b/libmsym.spec
@@ -1,6 +1,6 @@
 Name:          libmsym
 Version:       0.2.3
-Release:       1mamba
+Release:       2mamba
 Summary:       A C library dealing with point group symmetry in molecules
 Group:         System/Libraries
 Vendor:        openmamba
@@ -12,8 +12,6 @@ License:       MIT
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
 ## AUTOBUILDREQ-END
-Obsoletes:     avogadro <= 1.2.0-2mamba
-Obsoletes:     libavogadro <= 1.2.0-2mamba
 BuildRequires: cmake
 
 %description
@@ -23,7 +21,6 @@ libmsym is a C library dealing with point group symmetry in molecules.
 Group:         Development/Libraries
 Summary:       Development files for %{name}
 Requires:      %{name} = %{?epoch:%epoch:}%{version}-%{release}
-Obsoletes:     libavogadro-devel <= 1.2.0-2mamba
 
 %description devel
 This package contains libraries and header files for developing applications that use %{name}.
@@ -65,5 +62,8 @@ This package contains libraries and header files for developing applications tha
 %doc README.md
 
 %changelog
+* Sat Nov 02 2024 Silvan Calarco <silvan.calarco@mambasoft.it> 0.2.3-2mamba
+- don't obsolete avogadro and libavogadro
+
 * Thu May 09 2024 Silvan Calarco <silvan.calarco@mambasoft.it> 0.2.3-1mamba
 - package created using the webbuild interface