diff --git a/backend/src/services/collectionService.ts b/backend/src/services/collectionService.ts
index 74bfd1d84e..302d63ba94 100644
--- a/backend/src/services/collectionService.ts
+++ b/backend/src/services/collectionService.ts
@@ -455,7 +455,9 @@ export class CollectionService extends LoggerBase {
         }
       }
 
-      await this.syncRepositoryGroupsWithDb(qx, insightsProjectId, project.repositoryGroups)
+      if (project.repositoryGroups !== undefined) {
+        await this.syncRepositoryGroupsWithDb(qx, insightsProjectId, project.repositoryGroups)
+      }
 
       const txSvc = new CollectionService({
         ...this.options,
diff --git a/backend/src/services/segmentService.ts b/backend/src/services/segmentService.ts
index aa32044f5a..e53267a676 100644
--- a/backend/src/services/segmentService.ts
+++ b/backend/src/services/segmentService.ts
@@ -69,6 +69,15 @@ export default class SegmentService extends LoggerBase {
         })
       }
 
+      if (isSegmentSubproject(segment) && data.slug && data.slug !== segment.slug) {
+        const collectionService = new CollectionService({ ...this.options, transaction })
+        const projects = await collectionService.findInsightsProjectsBySegmentId(segment.id)
+        if (projects.length > 0) {
+          const normalizedSlug = data.slug.replace(/^nonlf_/, '')
+          await collectionService.updateInsightsProject(projects[0].id, { slug: normalizedSlug })
+        }
+      }
+
       await SequelizeRepository.commitTransaction(transaction)
 
       return await this.findById(id)
diff --git a/services/libs/data-access-layer/src/collections/index.ts b/services/libs/data-access-layer/src/collections/index.ts
index d53649bfac..7921faaa17 100644
--- a/services/libs/data-access-layer/src/collections/index.ts
+++ b/services/libs/data-access-layer/src/collections/index.ts
@@ -332,6 +332,23 @@ export async function updateInsightsProject(
     await syncRepositoriesEnabledStatus(qx, id, enabledUrls)
   }
 
+  // When slug changes, ON UPDATE CASCADE propagates the new slug to securityInsights* tables
+  // but does not touch their updatedAt — update it explicitly so Tinybird picks up the change
+  if (project.slug) {
+    await qx.result(
+      `UPDATE "securityInsightsEvaluationSuites" SET "updatedAt" = NOW() WHERE "insightsProjectSlug" = $(slug)`,
+      { slug: project.slug },
+    )
+    await qx.result(
+      `UPDATE "securityInsightsEvaluations" SET "updatedAt" = NOW() WHERE "insightsProjectSlug" = $(slug)`,
+      { slug: project.slug },
+    )
+    await qx.result(
+      `UPDATE "securityInsightsEvaluationAssessments" SET "updatedAt" = NOW() WHERE "insightsProjectSlug" = $(slug)`,
+      { slug: project.slug },
+    )
+  }
+
   return updated as IInsightsProject
 }