diff --git a/server/routes/application_analytics/app_analytics_router.ts b/server/routes/application_analytics/app_analytics_router.ts
index d6f5ffd11..898a83774 100644
--- a/server/routes/application_analytics/app_analytics_router.ts
+++ b/server/routes/application_analytics/app_analytics_router.ts
@@ -42,7 +42,7 @@ export function registerAppAnalyticsRouter(router: IRouter) {
       } catch (err: any) {
         console.error('Error occurred while fetching applications', err);
         return response.custom({
-          statusCode: err.statusCode || 500,
+          statusCode: err.statusCode || 400,
           body: err.message,
         });
       }
@@ -78,7 +78,7 @@ export function registerAppAnalyticsRouter(router: IRouter) {
       } catch (err: any) {
         console.error('Error occurred while fetching application', err);
         return response.custom({
-          statusCode: err.statusCode || 500,
+          statusCode: err.statusCode || 400,
           body: err.message,
         });
       }
@@ -120,7 +120,7 @@ export function registerAppAnalyticsRouter(router: IRouter) {
       } catch (err: any) {
         console.error('Error occurred while creating a new application', err);
         return response.custom({
-          statusCode: err.statusCode || 500,
+          statusCode: err.statusCode || 400,
           body: err.message,
         });
       }
@@ -161,7 +161,7 @@ export function registerAppAnalyticsRouter(router: IRouter) {
       } catch (err: any) {
         console.error('Error occurred while renaming an existing application', err);
         return response.custom({
-          statusCode: err.statusCode || 500,
+          statusCode: err.statusCode || 400,
           body: err.message,
         });
       }
@@ -210,7 +210,7 @@ export function registerAppAnalyticsRouter(router: IRouter) {
       } catch (err: any) {
         console.error('Error occurred while updating an existing application', err);
         return response.custom({
-          statusCode: err.statusCode || 500,
+          statusCode: err.statusCode || 400,
           body: err.message,
         });
       }
@@ -245,7 +245,7 @@ export function registerAppAnalyticsRouter(router: IRouter) {
         });
       } catch (err: any) {
         return response.custom({
-          statusCode: err.statusCode || 500,
+          statusCode: err.statusCode || 400,
           body: err.message,
         });
       }
diff --git a/server/routes/custom_panels/panels_router.ts b/server/routes/custom_panels/panels_router.ts
index 070f73b26..154ae3d5d 100644
--- a/server/routes/custom_panels/panels_router.ts
+++ b/server/routes/custom_panels/panels_router.ts
@@ -40,7 +40,7 @@ export function PanelsRouter(router: IRouter) {
       } catch (error: any) {
         console.error('Issue in fetching panel list:', error);
         return response.custom({
-          statusCode: error.statusCode || 500,
+          statusCode: error.statusCode || 400,
           body: error.message,
         });
       }
@@ -77,7 +77,7 @@ export function PanelsRouter(router: IRouter) {
       } catch (error: any) {
         console.error('Issue in fetching panel:', error);
         return response.custom({
-          statusCode: error.statusCode || 500,
+          statusCode: error.statusCode || 400,
           body: error.message,
         });
       }
@@ -118,7 +118,7 @@ export function PanelsRouter(router: IRouter) {
       } catch (error: any) {
         console.error('Issue in creating new panel', error);
         return response.custom({
-          statusCode: error.statusCode || 500,
+          statusCode: error.statusCode || 400,
           body: error.message,
         });
       }
@@ -146,7 +146,7 @@ export function PanelsRouter(router: IRouter) {
       );
 
       try {
-        const responseBody = await customPanelBackend.updatePanel(
+        const _responseBody = await customPanelBackend.updatePanel(
           opensearchNotebooksClient,
           request.body.panelId,
           request.body.panel
@@ -159,7 +159,7 @@ export function PanelsRouter(router: IRouter) {
       } catch (error: any) {
         console.error('Issue in updating panel', error);
         return response.custom({
-          statusCode: error.statusCode || 500,
+          statusCode: error.statusCode || 400,
           body: error.message,
         });
       }
@@ -187,7 +187,7 @@ export function PanelsRouter(router: IRouter) {
       );
 
       try {
-        const responseBody = await customPanelBackend.renamePanel(
+        const _responseBody = await customPanelBackend.renamePanel(
           opensearchNotebooksClient,
           request.body.panelId,
           request.body.panelName
@@ -200,7 +200,7 @@ export function PanelsRouter(router: IRouter) {
       } catch (error: any) {
         console.error('Issue in renaming panel', error);
         return response.custom({
-          statusCode: error.statusCode || 500,
+          statusCode: error.statusCode || 400,
           body: error.message,
         });
       }
@@ -245,7 +245,7 @@ export function PanelsRouter(router: IRouter) {
       } catch (error: any) {
         console.error('Issue in cloning panel', error);
         return response.custom({
-          statusCode: error.statusCode || 500,
+          statusCode: error.statusCode || 400,
           body: error.message,
         });
       }
@@ -272,7 +272,7 @@ export function PanelsRouter(router: IRouter) {
       );
 
       try {
-        const deleteResponse = await customPanelBackend.deletePanel(
+        const _deleteResponse = await customPanelBackend.deletePanel(
           opensearchNotebooksClient,
           request.params.panelId
         );
@@ -284,7 +284,7 @@ export function PanelsRouter(router: IRouter) {
       } catch (error: any) {
         console.error('Issue in deleting panel', error);
         return response.custom({
-          statusCode: error.statusCode || 500,
+          statusCode: error.statusCode || 400,
           body: error.message,
         });
       }
@@ -311,7 +311,7 @@ export function PanelsRouter(router: IRouter) {
       );
 
       try {
-        const deleteResponse = await customPanelBackend.deletePanelList(
+        const _deleteResponse = await customPanelBackend.deletePanelList(
           opensearchNotebooksClient,
           request.params.panelIdList
         );
@@ -323,7 +323,7 @@ export function PanelsRouter(router: IRouter) {
       } catch (error: any) {
         console.error('Issue in deleting panel', error);
         return response.custom({
-          statusCode: error.statusCode || 500,
+          statusCode: error.statusCode || 400,
           body: error.message,
         });
       }
@@ -354,7 +354,7 @@ export function PanelsRouter(router: IRouter) {
       );
 
       try {
-        const panelFilterResponse = await customPanelBackend.addPanelFilter(
+        const _panelFilterResponse = await customPanelBackend.addPanelFilter(
           opensearchNotebooksClient,
           request.body.panelId,
           request.body.query,
@@ -370,7 +370,7 @@ export function PanelsRouter(router: IRouter) {
       } catch (error: any) {
         console.error('Issue in adding query filter', error);
         return response.custom({
-          statusCode: error.statusCode || 500,
+          statusCode: error.statusCode || 400,
           body: error.message,
         });
       }
@@ -409,7 +409,7 @@ export function PanelsRouter(router: IRouter) {
       } catch (error: any) {
         console.error('Issue in fetching panel list:', error);
         return response.custom({
-          statusCode: error.statusCode || 500,
+          statusCode: error.statusCode || 400,
           body: error.message,
         });
       }
diff --git a/server/routes/event_analytics/event_analytics_router.ts b/server/routes/event_analytics/event_analytics_router.ts
index 57ed898dd..818678e0a 100644
--- a/server/routes/event_analytics/event_analytics_router.ts
+++ b/server/routes/event_analytics/event_analytics_router.ts
@@ -40,7 +40,7 @@ export const registerEventAnalyticsRouter = ({
 
       if (savedRes.success || savedRes?.data?.statusCode === 404) return res.ok(result);
 
-      result.statusCode = savedRes?.data?.statusCode || 500;
+      result.statusCode = savedRes?.data?.statusCode || 400;
       result.message = savedRes?.data || '';
       return res.custom(result);
     }
@@ -65,7 +65,7 @@ export const registerEventAnalyticsRouter = ({
 
       if (savedRes.success || savedRes?.data?.statusCode === 404) return res.ok(result);
 
-      result.statusCode = savedRes?.data?.statusCode || 500;
+      result.statusCode = savedRes?.data?.statusCode || 400;
       result.message = savedRes?.data || '';
       return res.custom(result);
     }
@@ -107,7 +107,7 @@ export const registerEventAnalyticsRouter = ({
 
       if (savedRes.success) return res.ok(result);
 
-      result.statusCode = savedRes?.data?.statusCode || 500;
+      result.statusCode = savedRes?.data?.statusCode || 400;
       result.message = savedRes?.data || '';
       return res.custom(result);
     }
@@ -160,7 +160,7 @@ export const registerEventAnalyticsRouter = ({
 
       if (savedRes.success) return res.ok(result);
 
-      result.statusCode = savedRes?.data?.statusCode || 500;
+      result.statusCode = savedRes?.data?.statusCode || 400;
       result.message = savedRes?.data || '';
       return res.custom(result);
     }
@@ -201,7 +201,7 @@ export const registerEventAnalyticsRouter = ({
         },
       };
       if (savedRes.success) return res.ok(result);
-      result.statusCode = savedRes?.data?.statusCode || 500;
+      result.statusCode = savedRes?.data?.statusCode || 400;
       result.message = savedRes?.data || '';
       return res.custom(result);
     }
@@ -253,7 +253,7 @@ export const registerEventAnalyticsRouter = ({
         },
       };
       if (updateRes.success) return res.ok(result);
-      result.statusCode = updateRes?.data?.statusCode || 500;
+      result.statusCode = updateRes?.data?.statusCode || 400;
       result.message = updateRes?.data || '';
       return res.custom(result);
     }
@@ -281,7 +281,7 @@ export const registerEventAnalyticsRouter = ({
 
       if (savedRes.success) return res.ok(result);
 
-      result.statusCode = savedRes?.data?.statusCode || 500;
+      result.statusCode = savedRes?.data?.statusCode || 400;
       result.message = savedRes?.data || '';
       return res.custom(result);
     }
@@ -312,7 +312,7 @@ export const registerEventAnalyticsRouter = ({
 
       if (savedRes.success) return res.ok(result);
 
-      result.statusCode = savedRes?.data?.statusCode || 500;
+      result.statusCode = savedRes?.data?.statusCode || 400;
       result.message = savedRes?.data || '';
       return res.custom(result);
     }
@@ -335,7 +335,7 @@ export const registerEventAnalyticsRouter = ({
         },
       };
       if (deleteResponse.success) return res.ok(result);
-      result.statusCode = deleteResponse?.data?.statusCode || 500;
+      result.statusCode = deleteResponse?.data?.statusCode || 400;
       result.message = deleteResponse?.data || '';
       return res.custom(result);
     }
@@ -360,7 +360,7 @@ export const registerEventAnalyticsRouter = ({
 
       if (savedRes.success) return res.ok(result);
 
-      result.statusCode = savedRes?.data?.statusCode || 500;
+      result.statusCode = savedRes?.data?.statusCode || 400;
       result.message = savedRes?.data || '';
       return res.custom(result);
     }
diff --git a/server/routes/metrics/metrics_rounter.ts b/server/routes/metrics/metrics_rounter.ts
index 595cd0636..f4ee9427d 100644
--- a/server/routes/metrics/metrics_rounter.ts
+++ b/server/routes/metrics/metrics_rounter.ts
@@ -99,7 +99,7 @@ export function registerMetricsRoute(router: IRouter, dataSourceEnabled: boolean
       } catch (error) {
         if (error.statusCode !== 404) console.error(error);
         return response.custom({
-          statusCode: error.statusCode || 500,
+          statusCode: error.statusCode || 400,
           body: error.message,
         });
       }
diff --git a/server/routes/ppl.ts b/server/routes/ppl.ts
index d9943aca6..2aa2a0324 100644
--- a/server/routes/ppl.ts
+++ b/server/routes/ppl.ts
@@ -33,7 +33,7 @@ export function registerPplRoute({ router, facet }: { router: IRouter; facet: PP
         return res.ok(result);
       }
       return res.custom({
-        statusCode: queryRes.data.statusCode || queryRes.data.status || 500,
+        statusCode: queryRes.data.statusCode || queryRes.data.status || 400,
         body: queryRes.data.body || queryRes.data.message || '',
       });
     }
diff --git a/server/routes/trace_analytics_dsl_router.ts b/server/routes/trace_analytics_dsl_router.ts
index 4d99ea401..4637ee983 100644
--- a/server/routes/trace_analytics_dsl_router.ts
+++ b/server/routes/trace_analytics_dsl_router.ts
@@ -51,7 +51,7 @@ export function registerTraceAnalyticsDslRouter(router: IRouter, dataSourceEnabl
       } catch (error) {
         console.error(error);
         return response.custom({
-          statusCode: error.statusCode || 500,
+          statusCode: error.statusCode || 400,
           body: error.message,
         });
       }
@@ -90,7 +90,7 @@ export function registerTraceAnalyticsDslRouter(router: IRouter, dataSourceEnabl
       } catch (error) {
         console.error(error);
         return response.custom({
-          statusCode: error.statusCode || 500,
+          statusCode: error.statusCode || 400,
           body: error.message,
         });
       }
@@ -157,7 +157,7 @@ export function registerTraceAnalyticsDslRouter(router: IRouter, dataSourceEnabl
         addRequestToMetric('trace_analytics', 'get', error);
         if (error.statusCode !== 404) console.error(error);
         return response.custom({
-          statusCode: error.statusCode || 500,
+          statusCode: error.statusCode || 400,
           body: error.message,
         });
       }