diff --git a/src/backend/app/db/models.py b/src/backend/app/db/models.py
index a2292335d..bd6234617 100644
--- a/src/backend/app/db/models.py
+++ b/src/backend/app/db/models.py
@@ -516,7 +516,11 @@ async def delete(cls, db: Connection, org_id: int) -> bool:
                 DELETE FROM projects
                 WHERE organisation_id = %(org_id)s
                 RETURNING organisation_id
-            ), deleted_org AS (
+            ), deleted_org_managers AS (
+                DELETE FROM organisation_managers
+                WHERE organisation_id = %(org_id)s
+                RETURNING organisation_id
+            ),deleted_org AS (
                 DELETE FROM organisations
                 WHERE id = %(org_id)s
                 RETURNING id
diff --git a/src/backend/app/organisations/organisation_routes.py b/src/backend/app/organisations/organisation_routes.py
index eba6d7edb..62c49eb4f 100644
--- a/src/backend/app/organisations/organisation_routes.py
+++ b/src/backend/app/organisations/organisation_routes.py
@@ -121,12 +121,13 @@ async def delete_org(
     org_user_dict: Annotated[AuthUser, Depends(org_admin)],
 ):
     """Delete an organisation."""
-    org_deleted = await DbOrganisation.delete(db, org_user_dict.id)
+    org = org_user_dict.get("org")
+    org_deleted = await DbOrganisation.delete(db, org.id)
     if not org_deleted:
-        log.error(f"Failed deleting org ({org_user_dict.name}).")
+        log.error(f"Failed deleting org ({org.name}).")
         raise HTTPException(
             status_code=HTTPStatus.UNPROCESSABLE_ENTITY,
-            detail=f"Failed deleting org ({org_user_dict.name}).",
+            detail=f"Failed deleting org ({org.name}).",
         )
     return Response(status_code=HTTPStatus.NO_CONTENT)