diff --git a/constants/null_doi.php b/constants/null_doi.php
index b9e65aa2c7..f7404eeeef 100644
--- a/constants/null_doi.php
+++ b/constants/null_doi.php
@@ -68,8 +68,6 @@
 '10.1379/1466-1268(2001)006<0377:GOAPAO>2.0.CO;2',
 '10.1385/1-59745-395-1:163',
 '10.1385/NMM:8:1-2:217',
-'10.1400/34421',
-'10.1400/41466',
 '10.14203/mri.v24i0.400',
 '10.14240/jmhs.v2i3.32',
 '10.14240/jmhs.v5i1.81',
@@ -390,6 +388,8 @@
 '10.1353/nlh.0.0065',
 '10.1353/pbm.1998.0022',
 '10.1358/dof.2007.032.09.1138229',
+'10.1400/34421',
+'10.1400/41466',
 '10.14241/asgp.2023.01',
 '10.14241/asgp.2023.03',
 '10.14241/asgp.2023.17',