diff --git a/bld/namelist_files/namelist_defaults_ctsm.xml b/bld/namelist_files/namelist_defaults_ctsm.xml
index d5d8bc08eb..d3b3cc9715 100644
--- a/bld/namelist_files/namelist_defaults_ctsm.xml
+++ b/bld/namelist_files/namelist_defaults_ctsm.xml
@@ -484,9 +484,9 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
 <!-- The default filenames are given relative to the root directory
      for the CLM2 data in the CESM distribution -->
 <!-- Plant function types (relative to {csmdata}) -->
-<paramfile phys="clm5_1" >lnd/clm2/paramdata/ctsm51_params.c240105.nc</paramfile>
-<paramfile phys="clm5_0" >lnd/clm2/paramdata/clm50_params.c240105.nc</paramfile>
-<paramfile phys="clm4_5" >lnd/clm2/paramdata/clm45_params.c240105.nc</paramfile>
+<paramfile phys="clm5_1" >lnd/clm2/paramdata/ctsm51_params.c240207b.nc</paramfile>
+<paramfile phys="clm5_0" >lnd/clm2/paramdata/clm50_params.c240207b.nc</paramfile>
+<paramfile phys="clm4_5" >lnd/clm2/paramdata/clm45_params.c240207b.nc</paramfile>
 
 <!-- ================================================================== -->
 <!-- FATES default parameter file                                       -->
diff --git a/cime_config/testdefs/testmods_dirs/clm/ciso_cwd_hr/user_nl_clm b/cime_config/testdefs/testmods_dirs/clm/ciso_cwd_hr/user_nl_clm
index 4e073859be..c235d72df1 100644
--- a/cime_config/testdefs/testmods_dirs/clm/ciso_cwd_hr/user_nl_clm
+++ b/cime_config/testdefs/testmods_dirs/clm/ciso_cwd_hr/user_nl_clm
@@ -1,2 +1,2 @@
-paramfile = '$DIN_LOC_ROOT/lnd/clm2/paramdata/ctsm51_ciso_cwd_hr_params.c240105.nc'
+paramfile = '$DIN_LOC_ROOT/lnd/clm2/paramdata/ctsm51_ciso_cwd_hr_params.c240207b.nc'
 hist_fincl1 = 'CWDC_HR','C13_CWDC_HR','C14_CWDC_HR','CWD_HR_L2','CWD_HR_L2_vr','CWD_HR_L3','CWD_HR_L3_vr'
diff --git a/doc/ChangeLog b/doc/ChangeLog
index dbb9b05c84..084516e23e 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -1,4 +1,56 @@
 ===============================================================
+Tag name: ctsm5.1.dev167
+Originator(s): samrabin (Sam Rabin, UCAR/TSS, samrabin@ucar.edu)
+Date: Thu 08 Feb 2024 01:56:05 PM MST
+One-line Summary: Delete _FillValue and history from parameter files
+
+Purpose and description of changes
+----------------------------------
+
+Updates parameter files to c240207b. These are the same as c240105 except:
+- Attribute _FillValue has been removed from all variables
+- Global attributes history, history_of_appended_files, and latest_git_log have been removed
+
+
+Significant changes to scientifically-supported configurations
+--------------------------------------------------------------
+
+Does this tag change answers significantly for any of the following physics configurations?
+(Details of any changes will be given in the "Answer changes" section below.)
+
+[ ] clm5_1
+
+[ ] clm5_0
+
+[ ] ctsm5_0-nwp
+
+[ ] clm4_5
+
+
+Bugs fixed
+----------
+
+CTSM issues fixed (include CTSM Issue #):
+- Fixes #2347
+
+
+Testing summary:
+----------------
+
+  regular tests (aux_clm: https://github.com/ESCOMP/CTSM/wiki/System-Testing-Guide#pre-merge-system-testing):
+
+    derecho ----- OK
+    izumi ------- OK
+
+
+Other details
+-------------
+
+Pull Requests that document the changes (include PR ids):
+- #2350: Delete _FillValue and history from parameter files (https://github.com/ESCOMP/CTSM/pull/2350)
+
+===============================================================
+===============================================================
 Tag name: ctsm5.1.dev166
 Originator(s): slevis (Samuel Levis,UCAR/TSS,303-665-1310), tking (Teagan King), samrabin (Sam Rabin)
 Date: Wed 24 Jan 2024 05:39:41 PM MST
diff --git a/doc/ChangeSum b/doc/ChangeSum
index bfc8b86174..d644cff144 100644
--- a/doc/ChangeSum
+++ b/doc/ChangeSum
@@ -1,5 +1,6 @@
 Tag                   Who      Date  Summary
 ============================================================================================================================
+    ctsm5.1.dev167 samrabin 02/08/2024 Delete _FillValue and history from parameter files
     ctsm5.1.dev166 multiple 01/24/2024 BFB merge tag
     ctsm5.1.dev165   slevis 01/19/2024 Turn Meier2022, tillage, residue removal on for ctsm5.1, fix #2212
     ctsm5.1.dev164   rgknox 01/17/2024 Compatibility and tests for FATES 2-Stream