diff --git a/src/Storages/MergeTree/registerStorageMergeTree.cpp b/src/Storages/MergeTree/registerStorageMergeTree.cpp
index 9ed87e5c9efe..2dfe348e4ba2 100644
--- a/src/Storages/MergeTree/registerStorageMergeTree.cpp
+++ b/src/Storages/MergeTree/registerStorageMergeTree.cpp
@@ -441,6 +441,15 @@ static StoragePtr create(const StorageFactory::Arguments & args)
     }
     else if (merging_params.mode == MergeTreeData::MergingParams::Replacing)
     {
+        /// Due to a misfortune, there could be an extra obsolete parameter.
+        /// We ignore it for backward compatibility.
+        if (arg_cnt - arg_num == 2 && !engine_args[arg_cnt - 1]->as<ASTLiteral>() && is_extended_storage_def)
+        {
+            if (!tryGetIdentifierName(engine_args[arg_cnt - 1]))
+                throw Exception(ErrorCodes::BAD_ARGUMENTS, "is_deleted column name must be an identifier {}", verbose_help_message);
+            --arg_cnt;
+        }
+
         /// If the last element is not index_granularity or replica_name (a literal), then this is the name of the version column.
         if (arg_cnt && !engine_args[arg_cnt - 1]->as<ASTLiteral>())
         {