diff --git a/api/controllers/console/app/conversation.py b/api/controllers/console/app/conversation.py
index c16dcfd91f..2819e5a054 100644
--- a/api/controllers/console/app/conversation.py
+++ b/api/controllers/console/app/conversation.py
@@ -338,9 +338,7 @@ class CompletionConversationApi(Resource):
         current_user, _ = current_account_with_tenant()
         args = CompletionConversationQuery.model_validate(request.args.to_dict(flat=True))  # type: ignore
 
-        query = sa.select(Conversation).where(
-            Conversation.app_id == app_model.id, Conversation.mode == "completion", Conversation.is_deleted.is_(False)
-        )
+        query = sa.select(Conversation).where(Conversation.app_id == app_model.id, Conversation.mode == "completion")
 
         if args.keyword:
             query = query.join(Message, Message.conversation_id == Conversation.id).where(
@@ -452,7 +450,7 @@ class ChatConversationApi(Resource):
             .subquery()
         )
 
-        query = sa.select(Conversation).where(Conversation.app_id == app_model.id, Conversation.is_deleted.is_(False))
+        query = sa.select(Conversation).where(Conversation.app_id == app_model.id)
 
         if args.keyword:
             keyword_filter = f"%{args.keyword}%"
diff --git a/api/migrations/versions/2025_11_27_1827-e5d7a95e676f_remove_unused_is_deleted_from_.py b/api/migrations/versions/2025_11_27_1827-e5d7a95e676f_remove_unused_is_deleted_from_.py
new file mode 100644
index 0000000000..d6b51b36b3
--- /dev/null
+++ b/api/migrations/versions/2025_11_27_1827-e5d7a95e676f_remove_unused_is_deleted_from_.py
@@ -0,0 +1,29 @@
+"""remove unused is_deleted from conversations
+
+Revision ID: e5d7a95e676f
+Revises: d57accd375ae
+Create Date: 2025-11-27 18:27:09.006691
+
+"""
+import sqlalchemy as sa
+from alembic import op
+
+revision = "e5d7a95e676f"
+down_revision = "d57accd375ae"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    conversations = sa.table("conversations", sa.column("is_deleted", sa.Boolean))
+    op.execute(sa.delete(conversations).where(conversations.c.is_deleted == sa.true()))
+
+    with op.batch_alter_table("conversations", schema=None) as batch_op:
+        batch_op.drop_column("is_deleted")
+
+
+def downgrade():
+    with op.batch_alter_table("conversations", schema=None) as batch_op:
+        batch_op.add_column(
+            sa.Column("is_deleted", sa.BOOLEAN(), server_default=sa.text("false"), autoincrement=False, nullable=False)
+        )
diff --git a/api/models/model.py b/api/models/model.py
index 88cb945b3f..d2ae4aabe9 100644
--- a/api/models/model.py
+++ b/api/models/model.py
@@ -676,8 +676,6 @@ class Conversation(Base):
         "MessageAnnotation", backref="conversation", lazy="select", passive_deletes="all"
     )
 
-    is_deleted: Mapped[bool] = mapped_column(sa.Boolean, nullable=False, server_default=sa.text("false"))
-
     @property
     def inputs(self) -> dict[str, Any]:
         inputs = self._inputs.copy()
diff --git a/api/services/conversation_service.py b/api/services/conversation_service.py
index 659e7406fb..09d62e7cf5 100644
--- a/api/services/conversation_service.py
+++ b/api/services/conversation_service.py
@@ -49,7 +49,6 @@ class ConversationService:
             return InfiniteScrollPagination(data=[], limit=limit, has_more=False)
 
         stmt = select(Conversation).where(
-            Conversation.is_deleted == False,
             Conversation.app_id == app_model.id,
             Conversation.from_source == ("api" if isinstance(user, EndUser) else "console"),
             Conversation.from_end_user_id == (user.id if isinstance(user, EndUser) else None),
@@ -168,7 +167,6 @@ class ConversationService:
                 Conversation.from_source == ("api" if isinstance(user, EndUser) else "console"),
                 Conversation.from_end_user_id == (user.id if isinstance(user, EndUser) else None),
                 Conversation.from_account_id == (user.id if isinstance(user, Account) else None),
-                Conversation.is_deleted == False,
             )
             .first()
         )
diff --git a/api/tests/test_containers_integration_tests/services/test_web_conversation_service.py b/api/tests/test_containers_integration_tests/services/test_web_conversation_service.py
index bbbf48ede9..6207761f56 100644
--- a/api/tests/test_containers_integration_tests/services/test_web_conversation_service.py
+++ b/api/tests/test_containers_integration_tests/services/test_web_conversation_service.py
@@ -149,7 +149,6 @@ class TestWebConversationService:
             from_end_user_id=user.id if isinstance(user, EndUser) else None,
             from_account_id=user.id if isinstance(user, Account) else None,
             dialogue_count=0,
-            is_deleted=False,
         )
 
         from extensions.ext_database import db