diff --git a/backend_py/primary/primary/routers/polygons/schemas.py b/backend_py/primary/primary/routers/polygons/schemas.py
index b63654cbd..4c20dbc7c 100644
--- a/backend_py/primary/primary/routers/polygons/schemas.py
+++ b/backend_py/primary/primary/routers/polygons/schemas.py
@@ -20,6 +20,7 @@ class PolygonsAttributeType(str, Enum):
     PINCHOUT = "pinchout"  # Values are pinchouts
     SUBCROP = "subcrop"  # Values are subcrops
     FAULT_LINES = "fault_lines"  # Values are fault lines
+    NAMED_AREA = "named_area"  # Values are named areas, e.g. CCS containment polygons
 
 
 class PolygonsMeta(BaseModel):
diff --git a/frontend/src/api/models/PolygonsAttributeType.ts b/frontend/src/api/models/PolygonsAttributeType.ts
index 225b58e8b..23a367698 100644
--- a/frontend/src/api/models/PolygonsAttributeType.ts
+++ b/frontend/src/api/models/PolygonsAttributeType.ts
@@ -17,4 +17,5 @@ export enum PolygonsAttributeType {
     PINCHOUT = 'pinchout',
     SUBCROP = 'subcrop',
     FAULT_LINES = 'fault_lines',
+    NAMED_AREA = 'named_area',
 }
diff --git a/frontend/src/api/models/WellboreHeader.ts b/frontend/src/api/models/WellboreHeader.ts
index 7da248cf6..61c60bdc4 100644
--- a/frontend/src/api/models/WellboreHeader.ts
+++ b/frontend/src/api/models/WellboreHeader.ts
@@ -13,6 +13,5 @@ export type WellboreHeader = {
     depthReferenceElevation: number;
     wellborePurpose: string;
     wellboreStatus: string;
-    slotIdentifier: string;
 };