1 files changed, 2 insertions, 0 deletions
diff --git a/src/mongo/db/catalog/index_key_validate.cpp b/src/mongo/db/catalog/index_key_validate.cpp
index caa209fd3c3..3a663298d5d 100644
--- a/src/mongo/db/catalog/index_key_validate.cpp
+++ b/src/mongo/db/catalog/index_key_validate.cpp
@@ -94,6 +94,7 @@ static std::set<StringData> allowedFieldNames = {
     IndexDescriptor::kUniqueFieldName,
     IndexDescriptor::kWeightsFieldName,
     IndexDescriptor::kOriginalSpecFieldName,
+    IndexDescriptor::kDisallowNewDuplicateKeysFieldName,
     // Index creation under legacy writeMode can result in an index spec with an _id field.
     "_id"};
 
@@ -497,6 +498,7 @@ StatusWith<BSONObj> validateIndexSpec(OperationContext* opCtx, const BSONObj& in
                     IndexDescriptor::k2dsphereCoarsestIndexedLevel == indexSpecElemFieldName ||
                     IndexDescriptor::k2dsphereFinestIndexedLevel == indexSpecElemFieldName ||
                     IndexDescriptor::kDropDuplicatesFieldName == indexSpecElemFieldName ||
+                    IndexDescriptor::kDisallowNewDuplicateKeysFieldName == indexSpecElemFieldName ||
                     "clustered" == indexSpecElemFieldName) &&
                    !indexSpecElem.isNumber() && !indexSpecElem.isBoolean()) {
             return {ErrorCodes::TypeMismatch,