diff --git a/nesis/api/alembic/versions/cbad6afbe13d_add_parent_id_to_task_unique_constraint.py b/nesis/api/alembic/versions/cbad6afbe13d_add_parent_id_to_task_unique_constraint.py
new file mode 100644
index 0000000..24ce66b
--- /dev/null
+++ b/nesis/api/alembic/versions/cbad6afbe13d_add_parent_id_to_task_unique_constraint.py
@@ -0,0 +1,35 @@
+"""add parent_id to task unique constraint
+
+Revision ID: cbad6afbe13d
+Revises: 50bebf15de30
+Create Date: 2024-06-13 23:59:45.211996
+
+"""
+
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = "cbad6afbe13d"
+down_revision: Union[str, None] = "50bebf15de30"
+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("uq_task_type_schedule", "task", type_="unique")
+    op.create_unique_constraint(
+        "uq_task_parent_id_type_schedule", "task", ["parent_id", "type", "schedule"]
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint("uq_task_parent_id_type_schedule", "task", type_="unique")
+    op.create_unique_constraint("uq_task_type_schedule", "task", ["type", "schedule"])
+    # ### end Alembic commands ###
diff --git a/nesis/api/core/models/entities.py b/nesis/api/core/models/entities.py
index 5b02adc..2bd5a12 100644
--- a/nesis/api/core/models/entities.py
+++ b/nesis/api/core/models/entities.py
@@ -394,7 +394,9 @@ class Task(Base):
     update_date = Column(DateTime, default=dt.datetime.utcnow, nullable=False)
 
     __table_args__ = (
-        UniqueConstraint("type", "schedule", name="uq_task_type_schedule"),
+        UniqueConstraint(
+            "parent_id", "type", "schedule", name="uq_task_parent_id_type_schedule"
+        ),
         Index("idx_task_type", "type"),
         Index("idx_task_parent", "parent_id"),
     )
diff --git a/nesis/api/core/services/task_service.py b/nesis/api/core/services/task_service.py
index 82dfa7a..b74f490 100644
--- a/nesis/api/core/services/task_service.py
+++ b/nesis/api/core/services/task_service.py
@@ -205,7 +205,7 @@ def create(self, **kwargs):
             error_str = str(exc).lower()
 
             if ("unique constraint" in error_str) and (
-                "uq_task_type_schedule" in error_str
+                "uq_task_parent_id_type_schedule" in error_str
             ):
                 # valid failure
                 raise ConflictException("Task already scheduled on this type")