diff --git a/jey_erp/custom_fields.py b/jey_erp/custom_fields.py
index c855ee0..280d467 100644
--- a/jey_erp/custom_fields.py
+++ b/jey_erp/custom_fields.py
@@ -913,7 +913,7 @@ def create_custom_fields():
                 hidden=1,
                 read_only=1,
                 no_copy=1,
-                description='Auto-synced to the first selected article. Replaced by the multi-select "Tax Articles (multi)" cell.'
+                description='Deprecated single-value field, no longer populated. Tax articles are stored per item row in the "Tax Articles" multi-select cell (custom_item_tax_articles). Kept for historic data only.'
             ),
             # --- multi tax-article per item row (click the cell to edit) ---
             dict(