This may be the finidat fix (based on the aux_clm failures on izumi)

bld/namelist_files/namelist_defaults_ctsm.xml

@@ -1341,18 +1341,6 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
          ic_ymd="18500101" sim_year="1850" do_transient_pfts=".false."
          ic_tod="0" glc_nec="10" use_crop=".true." irrigate=".false."
          lnd_tuning_mode="clm6_0_GSWP3v1" use_init_interp=".true."
->lnd/clm2/initdata_esmf/ctsm5.2/clmi.I1850Clm60BgcCrop-ciso.1361-01-01.ne30pg3_mg17_c240317.nc
-</finidat>
-<finidat hgrid="0.9x1.25" mask="gx1v7" use_cn=".true." use_cndv=".false." use_fates=".false."
-         ic_ymd="18500101" sim_year="1850" do_transient_pfts=".false."
-         ic_tod="0" glc_nec="10" use_crop=".true." irrigate=".false."
-         lnd_tuning_mode="clm6_0_GSWP3v1" use_init_interp=".true."
->lnd/clm2/initdata_esmf/ctsm5.3/ctsm52018_f09_xsiceON_acON_pSASU.clm2.r.0201-01-01-00000.nc
-</finidat>
-<finidat hgrid="0.9x1.25" mask="gx1v7" use_cn=".true." use_cndv=".false." use_fates=".false."
-         ic_ymd="18500101" sim_year="1850" do_transient_pfts=".true."
-         ic_tod="0" glc_nec="10" use_crop=".true." irrigate=".true."
-         lnd_tuning_mode="clm6_0_GSWP3v1" use_init_interp=".true."
 >lnd/clm2/initdata_esmf/ctsm5.3/ctsm52018_f09_xsiceON_acON_pSASU.clm2.r.0201-01-01-00000.nc
 </finidat>
 
@@ -1394,7 +1382,7 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
          ic_ymd="20110101" sim_year="2000" do_transient_pfts=".false."
          ic_tod="0" glc_nec="10" use_crop=".true." irrigate=".true."
          lnd_tuning_mode="clm6_0_GSWP3v1"
->lnd/clm2/initdata_esmf/ctsm5.2/clmi.I2000Clm52BgcCrop.2000-01-01.1.9x2.5_gx1v7_gl4_simyr2000_c240515.nc
+>lnd/clm2/initdata_esmf/ctsm5.3/ctsm52018_f09_xsiceON_acON_pSASU.clm2.r.0201-01-01-00000.nc
 </finidat>