diff --git a/modulefiles/clas12/5.1a b/modulefiles/clas12/5.1a
deleted file mode 100644
index 114eb18..0000000
--- a/modulefiles/clas12/5.1a
+++ /dev/null
@@ -1,41 +0,0 @@
-#%Module1.0
-
-module-whatis full clas12 environment, https://github.com/jeffersonlab/clas12-env
-
-source [file dirname $ModulesCurrentModulefile]/../util/functions.tcl
-
-prereq system
-
-# scicomp:
-prereq_optional scicomp
-prereq_optional cernlib/2023
-
-# java:
-prereq_optional jdk/21.0.2
-prereq_optional maven/3.9.0
-prereq_optional groovy/4.0.3
-prereq_optional coatjava/11.0.1
-prereq_optional ced/1.6.1
-prereq_optional mon12/7.9
-
-# c+++:
-prereq_optional cmake/3.29.0
-prereq_optional julia/1.10.2
-prereq_optional root/6.30.04
-prereq_optional ccdb/1.99.2
-prereq_optional qadb/1.3.0
-prereq_optional hipo/4.1.0
-prereq_optional denoise/4.0.1
-prereq_optional iguana/0.7.1
-prereq_optional clas12root/1.8.4
-prereq_optional mcgen/3.12
-
-# python:
-prereq_optional pymods/3.9
-prereq_optional rcdb/1.99.3
-prereq_optional util
-
-# gemc:
-prereq_optional sim
-prereq_optional gemc/5.10
-