diff --git a/packages/db/src/services/conversion.service.ts b/packages/db/src/services/conversion.service.ts
index 347191b33..fc721722d 100644
--- a/packages/db/src/services/conversion.service.ts
+++ b/packages/db/src/services/conversion.service.ts
@@ -118,11 +118,17 @@ export class ConversionService {
 
     const eventA = events[0]!;
     const eventB = events[1]!;
+    // Qualify with 'events' so event-level `properties[...]` becomes
+    // `events.properties[...]` — required when the conversion query also
+    // joins the profiles table (which exposes a `properties` column).
+    // Without the qualifier ClickHouse fails with "ambiguous identifier
+    // 'properties'" whenever a step filters on properties.X while a
+    // breakdown is on profile.properties.Y.
     const whereA = Object.values(
-      getEventFiltersWhereClause(eventA.filters, projectId),
+      getEventFiltersWhereClause(eventA.filters, projectId, 'events'),
     ).join(' AND ');
     const whereB = Object.values(
-      getEventFiltersWhereClause(eventB.filters, projectId),
+      getEventFiltersWhereClause(eventB.filters, projectId, 'events'),
     ).join(' AND ');
 
     const funnelWindowSeconds = funnelWindow * 3600;
diff --git a/packages/db/src/services/funnel.service.ts b/packages/db/src/services/funnel.service.ts
index 442c34df5..5a9ce8335 100644
--- a/packages/db/src/services/funnel.service.ts
+++ b/packages/db/src/services/funnel.service.ts
@@ -42,7 +42,13 @@ export class FunnelService {
   getFunnelConditions(events: IChartEvent[] = [], projectId?: string): string[] {
     return events.map((event) => {
       const { sb, getWhere } = createSqlBuilder();
-      sb.where = getEventFiltersWhereClause(event.filters, projectId);
+      // Qualify with 'events' so event-level `properties[...]` becomes
+      // `events.properties[...]` — required because the funnel CTE may join
+      // the profiles table (which also exposes a `properties` column).
+      // Without the qualifier ClickHouse fails with "ambiguous identifier
+      // 'properties'" whenever a step filters on properties.X while another
+      // step filters on profile.properties.Y.
+      sb.where = getEventFiltersWhereClause(event.filters, projectId, 'events');
       sb.where.name = `events.name = ${sqlstring.escape(event.name)}`;
       return getWhere().replace('WHERE ', '');
     });