diff --git a/app/plugins/builtins/ai_assistant/migrations/0001_initial.sql b/app/plugins/builtins/ai_assistant/migrations/0001_initial.sql
index e7bebd2..9e44b92 100644
--- a/app/plugins/builtins/ai_assistant/migrations/0001_initial.sql
+++ b/app/plugins/builtins/ai_assistant/migrations/0001_initial.sql
@@ -11,7 +11,8 @@ CREATE TABLE IF NOT EXISTS ai_providers (
     config JSONB NOT NULL DEFAULT '{}',
     tenant_id UUID NOT NULL,
     created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
-    updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    deleted_at TIMESTAMPTZ
 );
 CREATE INDEX IF NOT EXISTS ix_ai_providers_tenant ON ai_providers(tenant_id);
 
@@ -27,7 +28,8 @@ CREATE TABLE IF NOT EXISTS ai_models (
     config JSONB NOT NULL DEFAULT '{}',
     tenant_id UUID NOT NULL,
     created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
-    updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    deleted_at TIMESTAMPTZ
 );
 CREATE INDEX IF NOT EXISTS ix_ai_models_provider ON ai_models(provider_id);
 CREATE INDEX IF NOT EXISTS ix_ai_models_tenant ON ai_models(tenant_id);
@@ -45,7 +47,8 @@ CREATE TABLE IF NOT EXISTS ai_presets (
     is_active BOOLEAN NOT NULL DEFAULT TRUE,
     tenant_id UUID NOT NULL,
     created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
-    updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    deleted_at TIMESTAMPTZ
 );
 CREATE INDEX IF NOT EXISTS ix_ai_presets_tenant ON ai_presets(tenant_id);
 
@@ -61,7 +64,8 @@ CREATE TABLE IF NOT EXISTS ai_agents (
     config JSONB NOT NULL DEFAULT '{}',
     tenant_id UUID NOT NULL,
     created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
-    updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    deleted_at TIMESTAMPTZ
 );
 CREATE INDEX IF NOT EXISTS ix_ai_agents_tenant ON ai_agents(tenant_id);
 
@@ -74,7 +78,8 @@ CREATE TABLE IF NOT EXISTS ai_chat_sessions (
     is_sidebar BOOLEAN NOT NULL DEFAULT FALSE,
     tenant_id UUID NOT NULL,
     created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
-    updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    deleted_at TIMESTAMPTZ
 );
 CREATE INDEX IF NOT EXISTS ix_ai_sessions_user ON ai_chat_sessions(user_id);
 CREATE INDEX IF NOT EXISTS ix_ai_sessions_tenant ON ai_chat_sessions(tenant_id);
@@ -90,7 +95,8 @@ CREATE TABLE IF NOT EXISTS ai_chat_messages (
     model_used VARCHAR(200) NOT NULL DEFAULT '',
     tenant_id UUID NOT NULL,
     created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
-    updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    deleted_at TIMESTAMPTZ
 );
 CREATE INDEX IF NOT EXISTS ix_ai_messages_session ON ai_chat_messages(session_id);
 CREATE INDEX IF NOT EXISTS ix_ai_messages_tenant ON ai_chat_messages(tenant_id);