diff --git a/src/definitions/SOL002SOL003VNFLifecycleManagement_def.yaml b/src/definitions/SOL002SOL003VNFLifecycleManagement_def.yaml
index ce93baa564bcf39d46257292fc1214917e88458c..320ae89b0c97355f76869e88b4f01baf0e98ae39 100644
--- a/src/definitions/SOL002SOL003VNFLifecycleManagement_def.yaml
+++ b/src/definitions/SOL002SOL003VNFLifecycleManagement_def.yaml
@@ -659,6 +659,8 @@ definitions:
     oneOf:
       - required:
           - associatedVnfcCpId
+      - required:
+          - associatedVipCpId
       - required:
           - associatedVnfVirtualLinkId
     properties:
@@ -703,18 +705,16 @@ definitions:
           the VNFC CP which is exposed by this external CP instance, either directly or via a floating IP address.
           Shall be present in case this CP instance maps to a VNFC CP.
           The attributes "associatedVnfcCpId", "associatedVipCpId" and "associatedVnfVirtualLinkId" are mutually
-          exclusive. One and onlyExactly one shall be present.
+          exclusive. Exactly one shall be present.
         $ref: "SOL002SOL003_def.yaml#/definitions/IdentifierInVnf"
-
       associatedVipCpId:
         description: >
           Identifier of the VIP CP instance that is exposed as this VnfExtCp instance, either directly or via
           a floating IP address, and the related "VipCpInfo" structure in "VnfInstance". Shall be present if
           the cpdId of this VnfExtCp has a vipCpd attribute.
           The attributes "associatedVnfcCpId", "associatedVipCpId" and "associatedVnfVirtualLinkId"
-          are mutually exclusive. One and onlyExactly one shall be present.
+          are mutually exclusive. Exactly one shall be present.
         $ref: "SOL002SOL003_def.yaml#/definitions/IdentifierInVnf"
-
       associatedVnfVirtualLinkId:
         description: >
           Identifier of the "VnfVirtualLinkResourceInfo" structure that represents the internal VL
@@ -722,7 +722,7 @@ definitions:
           which is exposed by this external CP instance. Shall be present in case this CP instance maps to an
           internal VL (including externally-managed internal VL).
           The attributes "associatedVnfcCpId", "associatedVipCpId" and "associatedVnfVirtualLinkId" are mutually
-          exclusive. One and onlyExactly one shall be present.
+          exclusive. Exactly one shall be present.
         $ref: "SOL002SOL003_def.yaml#/definitions/IdentifierInVnf"
 
   VnfOperationalStateType: