diff --git a/backend/projects/serializers.py b/backend/projects/serializers.py
index 36b05072..99f5fc2c 100644
--- a/backend/projects/serializers.py
+++ b/backend/projects/serializers.py
@@ -83,6 +83,11 @@ class ProjectSerializer(serializers.ModelSerializer):
         tags.save(project=project)
         return project
 
+    def update(self, instance, validated_data):
+        # Don't update tags. Please use TagAPI.
+        validated_data.pop("tags", None)
+        return super().update(instance, validated_data)
+
 
 class TextClassificationProjectSerializer(ProjectSerializer):
     class Meta(ProjectSerializer.Meta):
diff --git a/frontend/services/application/project/projectApplicationService.ts b/frontend/services/application/project/projectApplicationService.ts
index ae50b497..132d51ca 100644
--- a/frontend/services/application/project/projectApplicationService.ts
+++ b/frontend/services/application/project/projectApplicationService.ts
@@ -35,6 +35,7 @@ export class ProjectApplicationService {
   public async update(item: ProjectWriteDTO): Promise<void> {
     try {
       const project = this.toWriteModel(item)
+      project.tags = []
       await this.repository.update(project)
     } catch(e: any) {
       throw new Error(e.response.data.detail)