diff --git a/x-pack/plugins/observability/server/assets/transform_templates/slo_transform_template.ts b/x-pack/plugins/observability/server/assets/transform_templates/slo_transform_template.ts
index 118c22425aa76..152517d7aa775 100644
--- a/x-pack/plugins/observability/server/assets/transform_templates/slo_transform_template.ts
+++ b/x-pack/plugins/observability/server/assets/transform_templates/slo_transform_template.ts
@@ -48,6 +48,7 @@ export const getSLOTransformTemplate = (
     group_by: groupBy,
     aggregations,
   },
+  defer_validation: true,
   _meta: {
     version: SLO_RESOURCES_VERSION,
     managed: true,
diff --git a/x-pack/plugins/observability/server/services/slo/summary_transform_generator/generators/occurrences.ts b/x-pack/plugins/observability/server/services/slo/summary_transform_generator/generators/occurrences.ts
index 2647e296f5544..3cae531cfeb98 100644
--- a/x-pack/plugins/observability/server/services/slo/summary_transform_generator/generators/occurrences.ts
+++ b/x-pack/plugins/observability/server/services/slo/summary_transform_generator/generators/occurrences.ts
@@ -127,6 +127,7 @@ export function generateSummaryTransformForOccurrences(slo: SLO): TransformPutTr
       deduce_mappings: false,
       unattended: true,
     },
+    defer_validation: true,
     _meta: {
       version: SLO_RESOURCES_VERSION,
       managed: true,
diff --git a/x-pack/plugins/observability/server/services/slo/summary_transform_generator/generators/timeslices_calendar_aligned.ts b/x-pack/plugins/observability/server/services/slo/summary_transform_generator/generators/timeslices_calendar_aligned.ts
index 6f5c27e5f869a..7fc5d98a94603 100644
--- a/x-pack/plugins/observability/server/services/slo/summary_transform_generator/generators/timeslices_calendar_aligned.ts
+++ b/x-pack/plugins/observability/server/services/slo/summary_transform_generator/generators/timeslices_calendar_aligned.ts
@@ -157,6 +157,7 @@ export function generateSummaryTransformForTimeslicesAndCalendarAligned(
       deduce_mappings: false,
       unattended: true,
     },
+    defer_validation: true,
     _meta: {
       version: SLO_RESOURCES_VERSION,
       managed: true,
diff --git a/x-pack/plugins/observability/server/services/slo/summary_transform_generator/generators/timeslices_rolling.ts b/x-pack/plugins/observability/server/services/slo/summary_transform_generator/generators/timeslices_rolling.ts
index a6212f671997b..113df2c4ce72f 100644
--- a/x-pack/plugins/observability/server/services/slo/summary_transform_generator/generators/timeslices_rolling.ts
+++ b/x-pack/plugins/observability/server/services/slo/summary_transform_generator/generators/timeslices_rolling.ts
@@ -129,6 +129,7 @@ export function generateSummaryTransformForTimeslicesAndRolling(
       deduce_mappings: false,
       unattended: true,
     },
+    defer_validation: true,
     _meta: {
       version: SLO_RESOURCES_VERSION,
       managed: true,
diff --git a/x-pack/plugins/observability/server/services/slo/transform_generators/__snapshots__/apm_transaction_duration.test.ts.snap b/x-pack/plugins/observability/server/services/slo/transform_generators/__snapshots__/apm_transaction_duration.test.ts.snap
index fbf38f386bb83..e74c237ad1992 100644
--- a/x-pack/plugins/observability/server/services/slo/transform_generators/__snapshots__/apm_transaction_duration.test.ts.snap
+++ b/x-pack/plugins/observability/server/services/slo/transform_generators/__snapshots__/apm_transaction_duration.test.ts.snap
@@ -422,6 +422,7 @@ Object {
     "managed_by": "observability",
     "version": 3,
   },
+  "defer_validation": true,
   "description": "Rolled-up SLI data for SLO: irrelevant [id: irrelevant, revision: 1]",
   "dest": Object {
     "index": ".slo-observability.sli-v3",
@@ -603,6 +604,7 @@ Object {
     "managed_by": "observability",
     "version": 3,
   },
+  "defer_validation": true,
   "description": "Rolled-up SLI data for SLO: irrelevant [id: irrelevant, revision: 1]",
   "dest": Object {
     "index": ".slo-observability.sli-v3",
diff --git a/x-pack/plugins/observability/server/services/slo/transform_generators/__snapshots__/apm_transaction_error_rate.test.ts.snap b/x-pack/plugins/observability/server/services/slo/transform_generators/__snapshots__/apm_transaction_error_rate.test.ts.snap
index 515980a9dee54..17b54f94be203 100644
--- a/x-pack/plugins/observability/server/services/slo/transform_generators/__snapshots__/apm_transaction_error_rate.test.ts.snap
+++ b/x-pack/plugins/observability/server/services/slo/transform_generators/__snapshots__/apm_transaction_error_rate.test.ts.snap
@@ -398,6 +398,7 @@ Object {
     "managed_by": "observability",
     "version": 3,
   },
+  "defer_validation": true,
   "description": "Rolled-up SLI data for SLO: irrelevant [id: irrelevant, revision: 1]",
   "dest": Object {
     "index": ".slo-observability.sli-v3",
@@ -566,6 +567,7 @@ Object {
     "managed_by": "observability",
     "version": 3,
   },
+  "defer_validation": true,
   "description": "Rolled-up SLI data for SLO: irrelevant [id: irrelevant, revision: 1]",
   "dest": Object {
     "index": ".slo-observability.sli-v3",
diff --git a/x-pack/plugins/observability/server/services/slo/transform_generators/__snapshots__/histogram.test.ts.snap b/x-pack/plugins/observability/server/services/slo/transform_generators/__snapshots__/histogram.test.ts.snap
index d5329ff7db9a7..7381a43902019 100644
--- a/x-pack/plugins/observability/server/services/slo/transform_generators/__snapshots__/histogram.test.ts.snap
+++ b/x-pack/plugins/observability/server/services/slo/transform_generators/__snapshots__/histogram.test.ts.snap
@@ -79,6 +79,7 @@ Object {
     "managed_by": "observability",
     "version": 3,
   },
+  "defer_validation": true,
   "description": "Rolled-up SLI data for SLO: irrelevant [id: irrelevant, revision: 1]",
   "dest": Object {
     "index": ".slo-observability.sli-v3",
@@ -241,6 +242,7 @@ Object {
     "managed_by": "observability",
     "version": 3,
   },
+  "defer_validation": true,
   "description": "Rolled-up SLI data for SLO: irrelevant [id: irrelevant, revision: 1]",
   "dest": Object {
     "index": ".slo-observability.sli-v3",
diff --git a/x-pack/plugins/observability/server/services/slo/transform_generators/__snapshots__/kql_custom.test.ts.snap b/x-pack/plugins/observability/server/services/slo/transform_generators/__snapshots__/kql_custom.test.ts.snap
index 0b5dc06be0a58..6b32d508b2319 100644
--- a/x-pack/plugins/observability/server/services/slo/transform_generators/__snapshots__/kql_custom.test.ts.snap
+++ b/x-pack/plugins/observability/server/services/slo/transform_generators/__snapshots__/kql_custom.test.ts.snap
@@ -120,6 +120,7 @@ Object {
     "managed_by": "observability",
     "version": 3,
   },
+  "defer_validation": true,
   "description": "Rolled-up SLI data for SLO: irrelevant [id: irrelevant, revision: 1]",
   "dest": Object {
     "index": ".slo-observability.sli-v3",
@@ -255,6 +256,7 @@ Object {
     "managed_by": "observability",
     "version": 3,
   },
+  "defer_validation": true,
   "description": "Rolled-up SLI data for SLO: irrelevant [id: irrelevant, revision: 1]",
   "dest": Object {
     "index": ".slo-observability.sli-v3",
diff --git a/x-pack/plugins/observability/server/services/slo/transform_generators/__snapshots__/metric_custom.test.ts.snap b/x-pack/plugins/observability/server/services/slo/transform_generators/__snapshots__/metric_custom.test.ts.snap
index ed5ee454a5596..d18f2f25a1427 100644
--- a/x-pack/plugins/observability/server/services/slo/transform_generators/__snapshots__/metric_custom.test.ts.snap
+++ b/x-pack/plugins/observability/server/services/slo/transform_generators/__snapshots__/metric_custom.test.ts.snap
@@ -119,6 +119,7 @@ Object {
     "managed_by": "observability",
     "version": 3,
   },
+  "defer_validation": true,
   "description": "Rolled-up SLI data for SLO: irrelevant [id: irrelevant, revision: 1]",
   "dest": Object {
     "index": ".slo-observability.sli-v3",
@@ -292,6 +293,7 @@ Object {
     "managed_by": "observability",
     "version": 3,
   },
+  "defer_validation": true,
   "description": "Rolled-up SLI data for SLO: irrelevant [id: irrelevant, revision: 1]",
   "dest": Object {
     "index": ".slo-observability.sli-v3",
diff --git a/x-pack/plugins/observability/server/services/slo/transform_generators/__snapshots__/timeslice_metric.test.ts.snap b/x-pack/plugins/observability/server/services/slo/transform_generators/__snapshots__/timeslice_metric.test.ts.snap
index 48ebb4de1e8d6..13077a79a7b3a 100644
--- a/x-pack/plugins/observability/server/services/slo/transform_generators/__snapshots__/timeslice_metric.test.ts.snap
+++ b/x-pack/plugins/observability/server/services/slo/transform_generators/__snapshots__/timeslice_metric.test.ts.snap
@@ -35,6 +35,7 @@ Object {
     "managed_by": "observability",
     "version": 3,
   },
+  "defer_validation": true,
   "description": "Rolled-up SLI data for SLO: irrelevant [id: irrelevant, revision: 1]",
   "dest": Object {
     "index": ".slo-observability.sli-v3",
@@ -259,6 +260,7 @@ Object {
     "managed_by": "observability",
     "version": 3,
   },
+  "defer_validation": true,
   "description": "Rolled-up SLI data for SLO: irrelevant [id: irrelevant, revision: 1]",
   "dest": Object {
     "index": ".slo-observability.sli-v3",