diff --git a/frappe/patches/v16_0/update_expression_series.py b/frappe/patches/v16_0/update_expression_series.py
index 0b4d81235e..757a9efdb7 100644
--- a/frappe/patches/v16_0/update_expression_series.py
+++ b/frappe/patches/v16_0/update_expression_series.py
@@ -56,4 +56,8 @@ def execute():
 		current = current[0].get("current")
 
 		for uniq_expr in uniq_exprs:
-			(frappe.qb.into(Series).columns("name", "current").insert(uniq_expr, current + 1)).run()
+			expr_exists = (frappe.qb.from_(Series).select("*").where(Series.name == uniq_expr)).run(
+				as_dict=True
+			)
+			if not expr_exists:
+				(frappe.qb.into(Series).columns("name", "current").insert(uniq_expr, current + 1)).run()