diff --git a/x-pack/plugins/observability_solution/apm/server/routes/errors/get_error_groups/get_error_sample_details.ts b/x-pack/plugins/observability_solution/apm/server/routes/errors/get_error_groups/get_error_sample_details.ts
index 91da19224d83c..954086ee53084 100644
--- a/x-pack/plugins/observability_solution/apm/server/routes/errors/get_error_groups/get_error_sample_details.ts
+++ b/x-pack/plugins/observability_solution/apm/server/routes/errors/get_error_groups/get_error_sample_details.ts
@@ -69,7 +69,6 @@ export async function getErrorSampleDetails({
   const requiredFields = asMutableArray([
     AGENT_NAME,
     PROCESSOR_EVENT,
-    TRACE_ID,
     TIMESTAMP_US,
     AT_TIMESTAMP,
     SERVICE_NAME,
@@ -78,6 +77,7 @@ export async function getErrorSampleDetails({
   ] as const);
 
   const optionalFields = asMutableArray([
+    TRACE_ID,
     TRANSACTION_ID,
     SPAN_ID,
     AGENT_VERSION,
@@ -131,7 +131,7 @@ export async function getErrorSampleDetails({
   const errorFromFields = unflattenKnownApmEventFields(hit.fields, requiredFields);
 
   const transactionId = errorFromFields.transaction?.id ?? errorFromFields.span?.id;
-  const traceId = errorFromFields.trace.id;
+  const traceId = errorFromFields.trace?.id;
 
   let transaction: Transaction | undefined;
   if (transactionId && traceId) {
diff --git a/x-pack/test/api_integration/deployment_agnostic/apis/observability/apm/errors/generate_data.ts b/x-pack/test/api_integration/deployment_agnostic/apis/observability/apm/errors/generate_data.ts
index ea22c866bd668..4859155239482 100644
--- a/x-pack/test/api_integration/deployment_agnostic/apis/observability/apm/errors/generate_data.ts
+++ b/x-pack/test/api_integration/deployment_agnostic/apis/observability/apm/errors/generate_data.ts
@@ -4,7 +4,7 @@
  * 2.0; you may not use this file except in compliance with the Elastic License
  * 2.0.
  */
-import { apm, timerange } from '@kbn/apm-synthtrace-client';
+import { ApmFields, apm, timerange } from '@kbn/apm-synthtrace-client';
 import type { ApmSynthtraceEsClient } from '@kbn/apm-synthtrace';
 
 export const config = {
@@ -25,11 +25,13 @@ export async function generateData({
   serviceName,
   start,
   end,
+  overrides,
 }: {
   apmSynthtraceEsClient: ApmSynthtraceEsClient;
   serviceName: string;
   start: number;
   end: number;
+  overrides?: Partial<ApmFields>;
 }) {
   const serviceGoProdInstance = apm
     .service({ name: serviceName, environment: 'production', agentName: 'go' })
@@ -40,18 +42,18 @@ export async function generateData({
 
   const documents = [appleTransaction, bananaTransaction].flatMap((transaction, index) => {
     return [
-      interval
-        .rate(transaction.successRate)
-        .generator((timestamp) =>
-          serviceGoProdInstance
-            .transaction({ transactionName: transaction.name })
-            .timestamp(timestamp)
-            .duration(1000)
-            .success()
-        ),
+      interval.rate(transaction.successRate).generator((timestamp) =>
+        serviceGoProdInstance
+          .transaction({ transactionName: transaction.name })
+          .overrides(overrides ? overrides : {})
+          .timestamp(timestamp)
+          .duration(1000)
+          .success()
+      ),
       interval.rate(transaction.failureRate).generator((timestamp) =>
         serviceGoProdInstance
           .transaction({ transactionName: transaction.name })
+          .overrides(overrides ? overrides : {})
           .errors(
             serviceGoProdInstance
               .error({ message: `Error ${index}`, type: transaction.name })
diff --git a/x-pack/test/api_integration/deployment_agnostic/apis/observability/apm/errors/group_id_samples.spec.ts b/x-pack/test/api_integration/deployment_agnostic/apis/observability/apm/errors/group_id_samples.spec.ts
index 9c20c97fde868..764a5a9bcb4b1 100644
--- a/x-pack/test/api_integration/deployment_agnostic/apis/observability/apm/errors/group_id_samples.spec.ts
+++ b/x-pack/test/api_integration/deployment_agnostic/apis/observability/apm/errors/group_id_samples.spec.ts
@@ -136,6 +136,33 @@ export default function ApiTest({ getService }: DeploymentAgnosticFtrProviderCon
         });
       });
 
+      describe('error sample without trace.id', () => {
+        before(async () => {
+          await generateData({
+            serviceName,
+            start,
+            end,
+            apmSynthtraceEsClient,
+            overrides: {
+              'trace.id': undefined,
+            },
+          });
+        });
+
+        after(() => apmSynthtraceEsClient.clean());
+
+        it('returns 200', async () => {
+          const errorsSamplesResponse = await callErrorGroupSamplesApi({
+            groupId: '0000000000000000000000000Error 1',
+          });
+
+          const errorId = errorsSamplesResponse.body.errorSampleIds[0];
+
+          const response = await callErrorSampleDetailsApi(errorId);
+          expect(response.status).to.be(200);
+        });
+      });
+
       describe('with sampled and unsampled transactions', () => {
         let errorGroupSamplesResponse: ErrorGroupSamples;