diff --git a/src/openapi/fiko/fiko-crud.yaml b/src/openapi/fiko/fiko-crud.yaml
index 6c0fd0a..8f7633c 100644
--- a/src/openapi/fiko/fiko-crud.yaml
+++ b/src/openapi/fiko/fiko-crud.yaml
@@ -18,14 +18,14 @@ paths:
         content:
           application/json:
             schema:
-              $ref: "#/components/schemas/TransactionItemsPostRequestBody"
+              $ref: "#/components/schemas/unavailable"
       responses:
         "201":
           description: Created
           content:
             application/json:
               schema:
-                $ref: "#/components/schemas/TransactionItemsPostResponseBody"
+                $ref: "#/components/schemas/unavailable"
   /fiko/transactionitems/bulk:
     post:
       summary: Add one ore more finanicial transaction items in bulk.
@@ -180,8 +180,9 @@ paths:
               schema:
                 $ref: "#/components/schemas/TransactionItemsGetResponseBody"
     post:
-      summary: Add a finanicial transaction item.
-      description: Add a finanicial transaction item.
+      summary: DEPRECATED. Add a finanicial transaction item.
+      description: DEPRECATED. This API is deprecated. Use bulk-insert instead.
+      deprecated: true
       tags:
         - Transactions v2
       requestBody:
@@ -370,75 +371,53 @@ paths:
             example: 9834b346-d68c-438d-9bd5-6716422c2657
           description: The id of the transaction item.
         - in: query
-          name: department
+          name: timestampBefore
           schema:
             type: string
-            example: 900
-          description: The department (element 1) of the processing failure.
+            example: 2022-01-01 00:00:00
+          description: The timestamp before the event occured.
         - in: query
-          name: costCenter
+          name: timestampAfter
+          schema:
+            type: string
+            example: 2022-01-01 00:00:00
+          description: The timestamp after the event occured.
+        - in: query
+          name: element
+          schema:
+            type: string
+            example: contraAccount
+          description: The element on which the validation failed.
+        - in: query
+          name: value
           schema:
             type: string
             example: 84955
-          description: The cost center (element 3) of the processing failure.
+          description: The value of th element on which the validation failed.
         - in: query
-          name: costType
+          name: reasonCode
           schema:
             type: string
-            example: 619031
-          description: The cost type (element 2) of the processing failure.
+            example: "002"
+          description: The code of the validation failure reason.
         - in: query
-          name: documentDate
+          name: reasonDescription
           schema:
             type: string
-            format: date
-            example: 2024-10-04
-          description: The document date of the processing failure.
+            example: Contra account does not exist.
+          description: The description of the validation failure reason.
         - in: query
-          name: documentCode
+          name: resolved
+          schema:
+            type: boolean
+            example: true
+          description: Whether the failure is resolved.
+        - in: query
+          name: change
           schema:
             type: string
-            example: VERK_FACTUUR
-          description: The document code of the processing failure.
-        - in: query
-          name: accountingPeriod
-          schema:
-            type: string
-            example: 2024/10
-          description: The accounting period of the processing failure.
-        - in: query
-          name: transactionDescription
-          schema:
-            type: string
-            example: Dagkaart
-          description: The transaction description of the processing failure.
-        - in: query
-          name: contraAccount
-          schema:
-            type: string
-            example: 220.10419
-          description: The contra account of the processing failure.
-        - in: query
-          name: status
-          schema:
-            type: array
-            items:
-              type: string
-            example: [open, rejected]
-          explode: false
-          description: The status of the processing failure.
-        - in: query
-          name: minOccurences
-          schema:
-            type: integer
-            example: 1
-          description: Minimum number of occurences.
-        - in: query
-          name: maxOccurences
-          schema:
-            type: integer
-            example: 3
-          description: Maximum number of occurences.
+            example: Adapt config
+          description: Description of what was changed to resolve the failure.
       responses:
         "200":
           description: OK
@@ -473,60 +452,6 @@ paths:
             application/json:
               schema:
                 $ref: "#/components/schemas/ProcessingFailuresPatchResponseBody"
-  /processingfailures/{processingFailureId}/processingfailureinstances:
-    parameters:
-      - in: path
-        name: processingFailureId
-        schema:
-          type: string
-          format: uuid
-          example: 37a8095b-19db-498f-9349-5f37d21c5bdf
-        required: true
-        description: The id of the processing failure.
-    post:
-      summary: Add a processing failure instance to a processing failure.
-      description: Add a processing failure instance to a processing failure.
-      tags:
-        - Failures v2
-      requestBody:
-        content:
-          application/json:
-            schema:
-              $ref: "#/components/schemas/ProcessingFailureInstancesPostRequestBody"
-      responses:
-        "201":
-          description: Created
-          content:
-            application/json:
-              schema:
-                $ref: "#/components/schemas/ProcessingFailureInstancesPostResponseBody"
-  /processingfailureinstances/{processingFailureInstanceId}:
-    parameters:
-      - in: path
-        name: processingFailureInstanceId
-        schema:
-          type: string
-          format: uuid
-          example: 37a8095b-19db-498f-9349-5f37d21c5bdf
-        required: true
-        description: The id of the processing failure instance.
-    patch:
-      summary: Update processing failure instance.
-      description: Update processing failure instance.
-      tags:
-        - Failures v2
-      requestBody:
-        content:
-          application/json:
-            schema:
-              $ref: "#/components/schemas/ProcessingFailureInstancesPatchRequestBody"
-      responses:
-        "200":
-          description: OK
-          content:
-            application/json:
-              schema:
-                $ref: "#/components/schemas/ProcessingFailureInstancesPatchResponseBody"
   /productmetadata:
     get:
       summary: Find product metadata.
@@ -1373,19 +1298,6 @@ paths:
             application/json:
               schema:
                 $ref: "#/components/schemas/ConcessionsGetResponseBody"
-  /failurereasons:
-    get:
-      summary: Get all failure reasons.
-      description: Get all failure reasons.
-      tags:
-        - References v2
-      responses:
-        "200":
-          description: OK
-          content:
-            application/json:
-              schema:
-                $ref: "#/components/schemas/FailureReasonsGetResponseBody"
 components:
   securitySchemes:
     bearerToken:
@@ -1451,6 +1363,7 @@ components:
                 example: debit
               productCode:
                 type: string
+                nullable: true
                 example: HTM-MND-20
               status:
                 type: string
@@ -1537,6 +1450,7 @@ components:
           example: debit
         productCode:
           type: string
+          nullable: true
           example: HTM-MND-20
         status:
           type: string
@@ -1623,6 +1537,7 @@ components:
                 example: debit
               productCode:
                 type: string
+                nullable: true
                 example: HTM-MND-20
             required:
               - sourceName
@@ -1705,34 +1620,43 @@ components:
       properties:
         name:
           type: string
+          nullable: true
           example: HTM Maandkorting 20%
         quantity:
           type: integer
+          nullable: true
           example: 1
         taxCode:
           type: string
+          nullable: true
           example: V21
         amountExclTax:
           type: integer
+          nullable: true
           example: 100
         amountInclTax:
           type: integer
+          nullable: true
           example: 121
         amountTax:
           type: integer
+          nullable: true
           example: 21
         occurredOn:
           type: string
+          nullable: true
           format: date-time
           example: 2024-10-04T00:00:00Z
         type:
           type: string
+          nullable: true
           enum:
             - debit
             - credit
           example: debit
         productCode:
           type: string
+          nullable: true
           example: HTM-MND-20
         status:
           type: string
@@ -1764,57 +1688,36 @@ components:
     ProcessingFailuresPostRequestBody:
       type: object
       properties:
-        department:
+        timestamp:
           type: string
-          nullable: true
-          example: 900
-        costCenter:
+          format: date-time
+          example: 2022-01-01 00:00:00
+        element:
+          type: string
+          example: costCenter
+        value:
           type: string
-          nullable: true
           example: 84955
-        costType:
+        reasonCode:
+          type: string
+          example: "002"
+        reasonDescription:
+          type: string
+          example: Contra account does not exist.
+        resolved:
+          type: boolean
+          example: false
+        change:
           type: string
           nullable: true
-          example: 619031
-        documentDate:
-          type: string
-          format: date
-          nullable: true
-          example: 2022-01-01
-        documentCode:
-          type: string
-          nullable: true
-          example: VERK_FACTUUR
-        accountingPeriod:
-          type: string
-          nullable: true
-          example: 2024/10
-        transactionDescription:
-          type: string
-          nullable: true
-          example: Dagkaart
-        contraAccountNumber:
-          type: string
-          nullable: true
-          example: 220.10419
-        status:
-          type: string
-          enum:
-            - open
-            - returned to trx-db
-            - returned to src
-          example: open
-        occurence:
-          type: integer
-          example: 1
-        processingFailureInstances:
-          type: array
-          items:
-            $ref: "#/components/schemas/ProcessingFailureInstancesPostRequestBody"
+          example: Adapt config
       required:
-        - status
-        - occurence
-        - processingFailureInstances
+        - timestamp
+        - element
+        - value
+        - reasonCode
+        - reasonDescription
+        - resolved
     ProcessingFailuresPostResponseBody:
       type: object
       properties:
@@ -1840,86 +1743,38 @@ components:
                 type: string
                 format: uuid
                 example: 2d77d978-7141-499a-84ad-93fad8ee03ce
-              department:
+              timestamp:
                 type: string
-                nullable: true
-                example: 900
-              costCenter:
+                format: date-time
+                example: 2022-01-01 00:00:00
+              element:
+                type: string
+                example: costCenter
+              value:
                 type: string
-                nullable: true
                 example: 84955
-              costType:
+              reasonCode:
+                type: string
+                example: "002"
+              reasonDescription:
+                type: string
+                example: Contra account does not exist.
+              resolved:
+                type: boolean
+                example: false
+              change:
                 type: string
                 nullable: true
-                example: 619031
-              documentDate:
-                type: string
-                format: date
-                nullable: true
-                example: 2022-01-01
-              documentCode:
-                type: string
-                nullable: true
-                example: VERK_FACTUUR
-              accountingPeriod:
-                type: string
-                nullable: true
-                example: 2024/10
-              transactionDescription:
-                type: string
-                nullable: true
-                example: Dagkaart
-              contraAccountNumber:
-                type: string
-                nullable: true
-                example: 220.10419
-              status:
-                type: string
-                enum:
-                  - open
-                  - returned to trx-db
-                  - returned to src
-                example: open
-              occurence:
-                type: integer
-                example: 1
-              processingFailureInstances:
-                type: array
-                items:
-                  type: object
-                  properties:
-                    processingFailureInstanceId:
-                      type: string
-                      format: uuid
-                      example: 9afa9a6b-5b6a-4b0a-9c9e-4b0a5b6a4b0a
-                    timestamp:
-                      type: string
-                      format: date-time
-                      example: 2022-01-01 00:00:00
-                    failureReason:
-                      $ref: "#/components/schemas/FailureReason"
-                    element:
-                      type: string
-                      example: costCenter
-                    occurence:
-                      type: integer
-                      example: 1
-                    change:
-                      type: string
-                      nullable: true
-                      example: Adapt config
-                  required:
-                    - processingFailureInstanceId
-                    - timestamp
-                    - failureReason
-                    - element
-                    - occurence
+                example: Adapt config
             required:
               - processingFailureId
               - transactionItemId
-              - status
-              - occurence
-              - processingFailureInstances
+              - timestamp
+              - element
+              - value
+              - reasonCode
+              - reasonDescription
+              - resolved
         href:
           type: string
           nullable: true
@@ -1928,18 +1783,14 @@ components:
     ProcessingFailuresPatchRequestBody:
       type: object
       properties:
-        status:
+        resolved:
+          type: boolean
+          nullable: true
+          example: true
+        change:
           type: string
-          enum:
-            - open
-            - returned to trx-db
-            - returned to src
           nullable: true
-          example: returned to trx-db
-        occurence:
-          type: integer
-          nullable: true
-          example: 2
+          example: Adapt config
     ProcessingFailuresPatchResponseBody:
       type: object
       properties:
@@ -1949,65 +1800,6 @@ components:
           example: 37a8095b-19db-498f-9349-5f37d21c5bdf
       required:
         - processingFailureId
-    ProcessingFailureInstancesPostRequestBody:
-      type: object
-      properties:
-        timestamp:
-          type: string
-          format: date-time
-          example: 2022-01-01 00:00:00
-        failureReasonId:
-          type: integer
-          example: 1
-        element:
-          type: string
-          example: costCenter
-        occurence:
-          type: integer
-          example: 1
-        change:
-          type: string
-          nullable: true
-          example: Adapt config
-      required:
-        - timestamp
-        - failureReason
-        - element
-        - occurence
-    ProcessingFailureInstancesPostResponseBody:
-      type: object
-      properties:
-        processingFailureInstanceId:
-          type: string
-          format: uuid
-          example: 37a8095b-19db-498f-9349-5f37d21c5bdf
-      required:
-        - processingFailureInstanceId
-    ProcessingFailureInstancesPatchRequestBody:
-      type: object
-      properties:
-        timestamp:
-          type: string
-          format: date-time
-          nullable: true
-          example: 2022-01-01 00:00:00
-        occurence:
-          type: integer
-          nullable: true
-          example: 1
-        change:
-          type: string
-          nullable: true
-          example: Adapt config
-    ProcessingFailureInstancesPatchResponseBody:
-      type: object
-      properties:
-        processingFailureInstanceId:
-          type: string
-          format: uuid
-          example: 37a8095b-19db-498f-9349-5f37d21c5bdf
-      required:
-        - processingFailureInstanceId
     TransactionAuditTrailsPostRequestBody:
       type: object
       properties:
@@ -2964,18 +2756,6 @@ components:
           nullable: true
           description: URI for pagination.
           example: null
-    FailureReasonsGetResponseBody:
-      type: object
-      properties:
-        failureReasons:
-          type: array
-          items:
-            $ref: '#/components/schemas/FailureReason'
-        href:
-          type: string
-          nullable: true
-          description: URI for pagination.
-          example: null
     ContraAccountMetadata:
       type: object
       properties:
@@ -3057,22 +2837,6 @@ components:
         - rejectionProcessing
         - rejectionInfo
         - validFrom
-    FailureReason:
-      type: object
-      properties:
-        failureReasonId:
-          type: integer
-          example: 2
-        reasonCode:
-          type: string
-          example: "002"
-        reasonDesc:
-          type: string
-          example: Contra account does not exist
-      required:
-        - failureReasonId
-        - reasonCode
-        - reasonDesc
     rfc9457:
       type: object
       properties: