diff --git a/erpnext/stock/report/stock_and_account_value_comparison/stock_and_account_value_comparison.py b/erpnext/stock/report/stock_and_account_value_comparison/stock_and_account_value_comparison.py
index d3654606613..48ca58cd334 100644
--- a/erpnext/stock/report/stock_and_account_value_comparison/stock_and_account_value_comparison.py
+++ b/erpnext/stock/report/stock_and_account_value_comparison/stock_and_account_value_comparison.py
@@ -86,12 +86,14 @@ def get_stock_ledger_data(report_filters, filters):
 		"Stock Ledger Entry",
 		filters=filters,
 		fields=[
-			"name",
+			# name is arbitrary per grouped voucher (many SLEs); posting_date/posting_time are constant
+			# per voucher -> MAX() keeps the GROUP BY valid on postgres with the same values MySQL picked.
+			{"MAX": "name", "as": "name"},
 			"voucher_type",
 			"voucher_no",
 			{"SUM": "stock_value_difference", "as": "stock_value"},
-			"posting_date",
-			"posting_time",
+			{"MAX": "posting_date", "as": "posting_date"},
+			{"MAX": "posting_time", "as": "posting_time"},
 		],
 		group_by="voucher_type, voucher_no",
 		order_by="posting_date ASC, posting_time ASC",
@@ -113,10 +115,12 @@ def get_gl_data(report_filters, filters):
 		"GL Entry",
 		filters=filters,
 		fields=[
-			"name",
+			# name is arbitrary per grouped voucher (many GL entries); posting_date is constant per
+			# voucher -> MAX() keeps the GROUP BY valid on postgres with the same values MySQL picked.
+			{"MAX": "name", "as": "name"},
 			"voucher_type",
 			"voucher_no",
-			"posting_date",
+			{"MAX": "posting_date", "as": "posting_date"},
 			{
 				"SUB": [{"SUM": "debit_in_account_currency"}, {"SUM": "credit_in_account_currency"}],
 				"as": "account_value",