diff --git a/src/devices/devices.service.ts b/src/devices/devices.service.ts
index feb01f1..846971b 100644
--- a/src/devices/devices.service.ts
+++ b/src/devices/devices.service.ts
@@ -178,6 +178,13 @@ export class DevicesService {
    */
   async remove(actor: ActorContext, id: number) {
     const current = await this.findRemovableDevice(actor, id);
+    const relatedTaskCount = await this.prisma.taskItem.count({
+      where: { deviceId: current.id },
+    });
+
+    if (relatedTaskCount > 0) {
+      throw new ConflictException(MESSAGES.DEVICE.DELETE_CONFLICT);
+    }
 
     try {
       return await this.prisma.device.delete({