diff --git a/packages/nodes-base/nodes/Postgres/v2/helpers/interfaces.ts b/packages/nodes-base/nodes/Postgres/v2/helpers/interfaces.ts
index 13f731a02a..57d5c6b22a 100644
--- a/packages/nodes-base/nodes/Postgres/v2/helpers/interfaces.ts
+++ b/packages/nodes-base/nodes/Postgres/v2/helpers/interfaces.ts
@@ -17,6 +17,8 @@ export type ColumnInfo = {
 	is_nullable: string;
 	udt_name?: string;
 	column_default?: string;
+	is_generated?: 'ALWAYS' | 'NEVER';
+	identity_generation?: 'ALWAYS' | 'NEVER';
 };
 export type EnumInfo = {
 	typname: string;
diff --git a/packages/nodes-base/nodes/Postgres/v2/helpers/utils.ts b/packages/nodes-base/nodes/Postgres/v2/helpers/utils.ts
index c9ec84ffdd..7367a62af4 100644
--- a/packages/nodes-base/nodes/Postgres/v2/helpers/utils.ts
+++ b/packages/nodes-base/nodes/Postgres/v2/helpers/utils.ts
@@ -376,13 +376,45 @@ export function prepareItem(values: IDataObject[]) {
 	return item;
 }
 
+export async function columnFeatureSupport(
+	db: PgpDatabase,
+): Promise<{ identity_generation: boolean; is_generated: boolean }> {
+	const result = await db.any(
+		`SELECT EXISTS (
+			SELECT 1 FROM information_schema.columns WHERE table_name = 'columns' AND table_schema = 'information_schema' AND column_name = 'is_generated'
+		) as is_generated,
+		EXISTS (
+			SELECT 1 FROM information_schema.columns WHERE table_name = 'columns' AND table_schema = 'information_schema' AND column_name = 'identity_generation'
+		) as identity_generation;`,
+	);
+
+	return result[0];
+}
+
 export async function getTableSchema(
 	db: PgpDatabase,
 	schema: string,
 	table: string,
+	options?: { getColumnsForResourceMapper?: boolean },
 ): Promise<ColumnInfo[]> {
+	const select = ['column_name', 'data_type', 'is_nullable', 'udt_name', 'column_default'];
+
+	if (options?.getColumnsForResourceMapper) {
+		// Check if columns exist before querying (identity_generation was added in v10, is_generated in v12)
+		const supported = await columnFeatureSupport(db);
+
+		if (supported.identity_generation) {
+			select.push('identity_generation');
+		}
+
+		if (supported.is_generated) {
+			select.push('is_generated');
+		}
+	}
+
+	const selectString = select.join(', ');
 	const columns = await db.any(
-		'SELECT column_name, data_type, is_nullable, udt_name, column_default FROM information_schema.columns WHERE table_schema = $1 AND table_name = $2',
+		`SELECT ${selectString} FROM information_schema.columns WHERE table_schema = $1 AND table_name = $2`,
 		[schema, table],
 	);
 
diff --git a/packages/nodes-base/nodes/Postgres/v2/methods/resourceMapping.ts b/packages/nodes-base/nodes/Postgres/v2/methods/resourceMapping.ts
index 08959acc6b..cad0923b05 100644
--- a/packages/nodes-base/nodes/Postgres/v2/methods/resourceMapping.ts
+++ b/packages/nodes-base/nodes/Postgres/v2/methods/resourceMapping.ts
@@ -62,7 +62,7 @@ export async function getMappingColumns(
 	}) as string;
 
 	try {
-		const columns = await getTableSchema(db, schema, table);
+		const columns = await getTableSchema(db, schema, table, { getColumnsForResourceMapper: true });
 		const unique = operation === 'upsert' ? await uniqueColumns(db, table, schema) : [];
 		const enumInfo = await getEnums(db);
 		const fields = await Promise.all(
@@ -72,11 +72,13 @@ export async function getMappingColumns(
 				const type = mapPostgresType(col.data_type);
 				const options =
 					type === 'options' ? getEnumValues(enumInfo, col.udt_name as string) : undefined;
-				const isAutoIncrement = col.column_default?.startsWith('nextval');
+				const hasDefault = Boolean(col.column_default);
+				const isGenerated = col.is_generated === 'ALWAYS' || col.identity_generation === 'ALWAYS';
+				const nullable = col.is_nullable === 'YES';
 				return {
 					id: col.column_name,
 					displayName: col.column_name,
-					required: col.is_nullable !== 'YES' && !isAutoIncrement,
+					required: !nullable && !hasDefault && !isGenerated,
 					defaultMatch: (col.column_name === 'id' && canBeUsedToMatch) || false,
 					display: true,
 					type,
diff --git a/packages/workflow/src/NodeHelpers.ts b/packages/workflow/src/NodeHelpers.ts
index 50474011cf..7a840b05fd 100644
--- a/packages/workflow/src/NodeHelpers.ts
+++ b/packages/workflow/src/NodeHelpers.ts
@@ -1230,6 +1230,11 @@ export const validateResourceMapperParameter = (
 	value: ResourceMapperValue,
 	skipRequiredCheck = false,
 ): Record<string, string[]> => {
+	// No issues to raise in automatic mapping mode, no user input to validate
+	if (value.mappingMode === 'autoMapInputData') {
+		return {};
+	}
+
 	const issues: Record<string, string[]> = {};
 	let fieldWordSingular =
 		nodeProperties.typeOptions?.resourceMapper?.fieldWords?.singular || 'Field';