diff --git a/imap_processing/cdf/config/imap_idex_global_cdf_attrs.yaml b/imap_processing/cdf/config/imap_idex_global_cdf_attrs.yaml
index 4ee513559..f7bb06ca1 100644
--- a/imap_processing/cdf/config/imap_idex_global_cdf_attrs.yaml
+++ b/imap_processing/cdf/config/imap_idex_global_cdf_attrs.yaml
@@ -113,3 +113,8 @@ imap_idex_l2c_sci-rectangular:
   Data_type: L2C_RECTANGULAR-MAP-10DAYS>Level-2C Rectangular Map 10-Day Data
   Logical_source: imap_idex_l2c_rectangular-map-10days
   Logical_source_description: IMAP Mission IDEX Instrument Level-2C Rectangular Map 10-Day Data
+  MODS:
+    - >-
+      Major version 2, Sept. 14, 2026 - Not publicly released. Numbered Major
+      Version 2 to keep major version numbers aligned with the upstream IDEX
+      Level 1/Level 2A products.
\ No newline at end of file