diff --git a/samples/sid_end_device/boards/nrf54l15dk_nrf54l15_cpuapp.overlay b/samples/sid_end_device/boards/nrf54l15dk_nrf54l15_cpuapp.overlay
index 4ccfdf8775..1ccedfa094 100644
--- a/samples/sid_end_device/boards/nrf54l15dk_nrf54l15_cpuapp.overlay
+++ b/samples/sid_end_device/boards/nrf54l15dk_nrf54l15_cpuapp.overlay
@@ -5,13 +5,6 @@
  */
 
 /{
-	aliases {
-		state-notifier-connected = &led0;
-		state-notifier-time-sync = &led1;
-		state-notifier-registered = &led2;
-		state-notifier-working = &led3;
-	};
-
 	semtech_sx1262_gpios{
 		compatible = "gpio-keys";
 		semtech_sx1262_reset_gpios: reset {
@@ -83,12 +76,18 @@ sid_semtech: &spi30 {
 &i2c20 {
 	status = "disabled";
 };
+&spi00 {
+	status = "disabled";
+};
 &spi20 {
 	status = "disabled";
 };
 &spi22 {
 	status = "disabled";
 };
+&mx25r64 {
+	status = "disabled";
+};
 
 // TODO: re-enable HWFC once it's fixed
 &uart20 {
diff --git a/samples/sid_end_device/boards/nrf54l15dk_nrf54l15_cpuapp_ns.overlay b/samples/sid_end_device/boards/nrf54l15dk_nrf54l15_cpuapp_ns.overlay
index baf527fc41..e0c601967c 100644
--- a/samples/sid_end_device/boards/nrf54l15dk_nrf54l15_cpuapp_ns.overlay
+++ b/samples/sid_end_device/boards/nrf54l15dk_nrf54l15_cpuapp_ns.overlay
@@ -83,12 +83,18 @@ sid_semtech: &spi30 {
 &i2c20 {
 	status = "disabled";
 };
+&spi00 {
+	status = "disabled";
+};
 &spi20 {
 	status = "disabled";
 };
 &spi22 {
 	status = "disabled";
 };
+&mx25r64 {
+	status = "disabled";
+};
 
 // TODO: re-enable HWFC once it's fixed
 &uart20 {
diff --git a/samples/sid_end_device/prj_release.conf b/samples/sid_end_device/prj_release.conf
index fc82fd5e12..9eb402b773 100644
--- a/samples/sid_end_device/prj_release.conf
+++ b/samples/sid_end_device/prj_release.conf
@@ -26,6 +26,7 @@ CONFIG_ASSERT_VERBOSE=n
 CONFIG_ASSERT_NO_FILE_INFO=y
 CONFIG_PRINTK_SYNC=n
 CONFIG_THREAD_NAME=n
+CONFIG_ASSERT=n
 
 # Power Management
 CONFIG_PM_DEVICE=y