diff --git a/src/constants/ingestion/constants.ts b/src/constants/ingestion/constants.ts
index 63df2e0..e300677 100644
--- a/src/constants/ingestion/constants.ts
+++ b/src/constants/ingestion/constants.ts
@@ -97,6 +97,7 @@ export const ValidationErrorType = {
   SMALL_GEOMETRY: 'Small_Geometry',
   SMALL_HOLES: 'Small_Holes',
   RESOLUTION: 'Resolution',
+  UNKNOWN: 'Unknown',
 } as const;
 /* eslint-enable @typescript-eslint/naming-convention */
 
diff --git a/src/schemas/ingestion/validationTask.schema.ts b/src/schemas/ingestion/validationTask.schema.ts
index 644334e..1f6e142 100644
--- a/src/schemas/ingestion/validationTask.schema.ts
+++ b/src/schemas/ingestion/validationTask.schema.ts
@@ -13,6 +13,7 @@ export const featuresErrorCountSchema = z.object({
   resolution: counterSchema.describe('Number of features not matching the required resolution'),
   smallHoles: counterSchema.describe('Number of features containing small holes'),
   smallGeometries: counterSchema.describe('Number of features containing small geometries'),
+  unknown: counterSchema.describe('Number of features with unknown errors'),
 });
 
 export const thresholdsSchema = z.object({
diff --git a/src/types/ingestion/report.type.ts b/src/types/ingestion/report.type.ts
index a58d6c5..d7dfc0a 100644
--- a/src/types/ingestion/report.type.ts
+++ b/src/types/ingestion/report.type.ts
@@ -2,8 +2,8 @@ import { ValidationErrorType } from '../../constants';
 
 export type PolygonPartValidationErrorsType = Pick<
   typeof ValidationErrorType,
-  'RESOLUTION' | 'GEOMETRY_VALIDITY' | 'SMALL_GEOMETRY' | 'SMALL_HOLES'
->[keyof Pick<typeof ValidationErrorType, 'GEOMETRY_VALIDITY' | 'RESOLUTION' | 'SMALL_GEOMETRY' | 'SMALL_HOLES'>];
+  'RESOLUTION' | 'GEOMETRY_VALIDITY' | 'SMALL_GEOMETRY' | 'SMALL_HOLES' | 'UNKNOWN'
+>[keyof Pick<typeof ValidationErrorType, 'GEOMETRY_VALIDITY' | 'RESOLUTION' | 'SMALL_GEOMETRY' | 'SMALL_HOLES' | 'UNKNOWN'>];
 
 export interface PolygonPartValidationError {
   id: string;