diff --git a/backend/src/alembic/versions/5bcc9d14725a_vscode_launcher.py b/backend/src/alembic/versions/5bcc9d14725a_vscode_launcher.py
new file mode 100644
index 000000000..84467ddbe
--- /dev/null
+++ b/backend/src/alembic/versions/5bcc9d14725a_vscode_launcher.py
@@ -0,0 +1,39 @@
+"""add tag unique constraint
+
+Revision ID: 5bcc9d14725a
+Revises: 00e56404d2b2
+Create Date: 2024-10-07 13:03:01.694780
+
+"""
+
+from typing import Sequence, Union
+
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision: str = "5bcc9d14725a"
+down_revision: Union[str, None] = "00e56404d2b2"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint("UC_name_unique_per_project", "code", type_="unique")
+    op.create_unique_constraint(
+        "UC_code_name_unique_per_project", "code", ["project_id", "name"]
+    )
+    op.create_unique_constraint(
+        "UC_tag_name_unique_per_project", "documenttag", ["project_id", "name"]
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint("UC_tag_name_unique_per_project", "documenttag", type_="unique")
+    op.drop_constraint("UC_code_name_unique_per_project", "code", type_="unique")
+    op.create_unique_constraint(
+        "UC_name_unique_per_project", "code", ["project_id", "name"]
+    )
+    # ### end Alembic commands ###
diff --git a/backend/src/app/core/data/orm/code.py b/backend/src/app/core/data/orm/code.py
index cda73601e..3d8258c4f 100644
--- a/backend/src/app/core/data/orm/code.py
+++ b/backend/src/app/core/data/orm/code.py
@@ -69,6 +69,6 @@ class CodeORM(ORMBase):
         UniqueConstraint(
             "project_id",
             "name",
-            name="UC_name_unique_per_project",
+            name="UC_code_name_unique_per_project",
         ),
     )
diff --git a/backend/src/app/core/data/orm/document_tag.py b/backend/src/app/core/data/orm/document_tag.py
index 702c7cc0a..3a7a3f687 100644
--- a/backend/src/app/core/data/orm/document_tag.py
+++ b/backend/src/app/core/data/orm/document_tag.py
@@ -1,7 +1,7 @@
 from datetime import datetime
 from typing import TYPE_CHECKING, List, Optional
 
-from sqlalchemy import DateTime, ForeignKey, Integer, String, func
+from sqlalchemy import DateTime, ForeignKey, Integer, String, UniqueConstraint, func
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from app.core.data.orm.orm_base import ORMBase
@@ -57,6 +57,14 @@ class DocumentTagORM(ORMBase):
     )
     parent: Mapped["DocumentTagORM"] = relationship("DocumentTagORM", remote_side=[id])
 
+    __table_args__ = (
+        UniqueConstraint(
+            "project_id",
+            "name",
+            name="UC_tag_name_unique_per_project",
+        ),
+    )
+
 
 class SourceDocumentDocumentTagLinkTable(ORMBase):
     source_document_id: Mapped[int] = mapped_column(